m = mass Complete the following table (a) What is the baseballs acceleration in m/s and in Ws? A football player at practice pushes a 60 kg blocking sled across the field at a constant . A football player at practice pushes a 60 kg blocking sled across the field at a constant speed. 5 - A construction crew would like to support a 1000 Ch. No human can push on a bat with that much force. force acting on the 50 kg block shown if. -Combination of force and velocity determines power output 200 N 5 - The forces in Figure P5.11 are acting on a 2.0 kg Ch. B. (b) If all other conditions are the same but the ramp has a friction force of 1.9 N, what is the acceleration? W = work done | A football player at practice pushes a 60 kg blocking sled across the field at a constant speed. 300 N 5 - a. (a) When the truck accelerates forward, what force accelerates the box? 18 N B. Mass of sled m = 80 kg What is the tension produced on the clothesline by the dress? A discus thrower exerts an average force of 1000 N against the discus while the discus moves through a displacement of 0.6 m in the direction of this force. (a), Q:Q5) A child pulls a wagon with a force of 20N by a rope making an angle of 25 with the The coefficient of kinetic friction between the grass and the sled is 0.30. How much work did the discus thrower do to the discus? The object slow down with an acceleration of -5 m/s2. Suddenly your Ch. Group Practice Problem: The coefficient of dynamic friction between the grass and a Feedback What is torque and how do we calculate it? You'll get a detailed solution from a subject matter expert that helps you learn core concepts. W = work done on an object(in joules) 5 - A 2.0 kg ball is suspended by two light strings as Ch. -potential: energy due to position 0.38 m How much force must he apply to the sled? The mass of the 5 - Seat belts and air bags save lives by reducing the Ch. The coefficient of kinetic friction between the grass and the sled is 0.30. In most human movement, changes in momentum result from? d = force's moment arm, shortest (perpendicular) distance between a force's line of action and an axis of rotation (joint). The, Q:Notes Calculate the force required to push the sled across the field. 5 - Two blocks are at rest on a frictionless incline, Ch. William Moebs, Samuel J. Ling, Jeff Sanny. 5 - An astronauts weight on earth is 800 N. What is Ch. The rider applies the brakes, causing the motorcycle to accelerate at a rate of 5 m/s2. The mass of the car is 1000.0 kg. Determine the distance the football players have moved the blocking sled. -MOI (I) reduces when the diver goes from a layout to a tuck and then increases as the diver opens up to enter into the water. She needs to move a heavy crate of bananas ( m = 80 kg) to the, Q:Mr. Vollmayer pulls his children (21kg and 24kg) on a sled (5kg). Determine the coefficient of kinetic friction between the player and the sled. A football player at practice pushes 65 kg blocking sled across the field at a constant speed. Thus, to be in equilibrium, the body COM must be within the boundaries of the base of support. A Mass of 15.0 kg is on an incline with a coefficient of static friction of The coefficient of kinetic friction between the grass and the sled is 0.30. The box moves up at a, Q:(II) (a) A box sits at rest on a rough 33 inclined plane.Draw the free-body diagram, showing all, Q:Suppose a 60.0 Kg gymnast climbs a rope. Get 5 free video unlocks on our app with code GOMOBILE, foothall player at prartice pushes 200 pound blocking sled across the field constanr speeo Howmuch force must he apply to the sled? A. ---When the line of action of a body's weight (directed form the CG) moves outside the base of support, a torque is created that tends to cause angular motion of the body, thereby disrupting stability, with the CG falling toward the ground. I = mk2 in height (15 cm) to just, Q:1. a) What force does the earth exert on the box? Friction Group Practice Problem: The coefficient of dynamic friction between the grass and a 200 kg football blocking sled is 0.20. first, Fa =, Q:Susan gently pushes the tip of her finger against the eraser on her pencil and What mass would a ball need to have if it is thrown at 34 m/s and stops a 78 kg person moving at 3 m/s when they catch it? The road is slick,, A:(a)The resultant of two forces F1 andF2 is given by, -Angular velocity () increases when the MOI decreases and it decreases as the diver increases MOI. A car is, Q:Dynamics - A 4 kg block sitting on a table is pulled to the right by a 15 N force. (increases in impact velocity and temp increase COR). 5 - Riders on the Power Tower are launched skyward Ch. How much force must he apply to the sled? 5 - An astronaut takes his bathroom scale to the moon Ch. A football player at practice pushes a 70 kg blocking sled across the field at a constant speed. The coefficient of kinetic friction between the grass and the sled is 0.30. -more stable = able to resist a larger force, point about which the ground reaction force is balanced, Area enclosed by all points at which the body contacts a supporting surface. Since the floor is smooth , contribution of all frictional forces = 0. near a forest As a baseball is being caught, its speed goes from 30 to 0 m/s in about 0.005 s. Its mass is 0.145 kg. 1 Determine the coefficient of kinetic friction between the player and the sled. 5 - Running on a treadmill is slightly easier than Ch. Product of muscle tension and muscle moment arm produces a torque at the joint crossed by the muscle, Muscles develop tension-->pulling on bones to support or move a resistance, moment arm (force) / moment arm (resistance) 2003-2023 Chegg Inc. All rights reserved. For equilibrium, the center of pressure must be directly below the body COM 0.30,and 1 6-22 Paunt The coefficient of static friction between sled and grass is 0.73, and the coefficient of kinetic friction between sled and grass is 0.68. (b) What is the tension in the rope if he accelerates upward at a rate of 1.50 m/s2? If the force of friction including air resistance is 250 N and the acceleration of the car is 1.80 m/s2, what is the mass of the car plus its occupants? If the two players entangle and continue traveling together as a unit following the collision, what is their combined velocity? the point around which the mass and weight of a body are balanced in all directions OR The point about which the sum of torques produced by the weights of the body segments is equal to zero. 11. A 7.0-N force parallel to an incline is applied to a 1.0-kg crate. When the elevator is accelerating downward at 3.8m/s2 , the scale reads 60 N. (a) What Is the mass of the backpack? 5 - A 4000 kg truck is parked on a 7.0 slope. (a), A:When a body is at rest, the force that is required to just start the motion of the object from rest, Q:55. -the more impulse generated against the floor the higher the jump, collision characterized by the exchange of a large force during a small interval; (total momentum before and after impact are =) The coefficient of static, A:Given: 1 m/s2, what is the ships mass? Impulse = Ft 5 - The two angled ropes are used to support the crate Ch. The figure shows the overhead views of four situations in which forces act on a, A:Q7. (b) What is the force in the hitch between the car and the trailer if 80% of the resisting forces are experienced by the boat and trailer? Acceleration of drone = 5.0 m/s2 hd = height from which ball is dropped To find P = Fv. 5 - The air is less dense at higher elevations, so Ch. 5 - You are going sledding with your friends, sliding Ch. Start your trial now! A football player at practice pushes a 60 kg blocking sled across the field at a constant speed. Calculate the force required to push the sled across the field. coetticient How much kinetic energy does a baseball thrown at 80 mi/hr (35.8 m/s) have? Its passenger has a mass of, Q:9000 kg airplane accelerates upward at 2.0 m/s. A Suppose you place a block of mass M on a plane inclined at an angle . A- 3, A:Consider an object for which the distancest given as a function of timet. Upon differentiating, Q:B A 500 N BALIKBAYAN BOX WAS UNLOADED BY A DELIVERY TRUCK IN A DRIVEWAY. -The higher the position of the CG, the greater the potentially disruptive torque created if the body undergoes an angular displacement. DESTION 7 Angle,=140, Q:A hoist is used to lift a 780 kg car upward with an acceleration of 0.110 m/s. (a) What is the tension in the rope if he climbs at, Q:A 2.0-kg block is at rest on ramp which makes 20 with the horizontal. A 1100-kg car pulls a boat on a trailer. 5 - It is friction that provides the force for a car Ch. . Here, m is the mass of the sled and a is the, Q:Problem 4: A crate sits on a rough surface. The force of the bat on the, Q:Alberto tries to move a 23.3 kg desk that is stopped on a horizontal surface, just as Alberto If you, A:Alberto tries to move a 23.3 kg desk that is stopped on a horizontal surface, just as Alberto If you, Q:Q2 As illustrated in Fig., consider two workers who are trying to move a block. . A 0.60 kg bullfrog is sitting at rest on a Ch. How much force does an 80 kg astronaut exert on Ch. (a) What total force resists the motion of the car, boat, and trailer, if the car exerts a 1900-N force on the road and produces an acceleration of 0.550 m/s2? What must aybe, Q:1. a) A boat moves through the water with two forces acting on it. GET IT MOVING TOWARDA, A:The opposing force experienced by an object when moving in contact with a surface is known as the, Q:Jack pulls a cart with a force of 30 N by a rope tied to a cart and making an angle of 25 with the, Q:2) Suppose that a sled is accelerating at a rate of 2 m/s?. Another implication is that when a weight vector is drawn for an object displayed in a free body diagram, the weight vector acts as the CG. The elevator takes 4.0 s to brake to a stop at the first. When the freight car begins to move, the string makes an angle of 35.0with the vertical. 4 near a marsh Mass of the airplane, \[m=9000\text{ kg}\] 5 - A 20,000 kg rocket has a rocket motor that Ch. Here a = acceleration Linear momentum: quantity of motion, measured as the product of a body's mass and its velocity. A force of 45 Newtons is required to start a 5.0 kg box moving across a horizontal. A. H = Iw A boy pushes the sled and it Suppose Kevin, a 60.0-kg gymnast, climbs a rope. (a) What is the acceleration of the freight car? A person stands on a scale inside an elevator at rest (Figure 2.54). Compare the force block A, A:Given: (b) What is the tension in the string? Find P for motion to, Q:5 Clear A man applies 803 N of force to When the freight car begins to move, the string makes an angle of 35.0with the vertical. What factors influence u (the coefficient of friction)? -The horizontal location of the CG: The closer the horizontal location of the CG is to the boundary of the base of support, the smaller is the force required to push it outside the base of support, thereby disrupting equilibrium. answer choices 18 N 60 N 180 N 600 N Question 9 60 seconds The ramp is tilted at 20 and is frictionless. a., Q:1) An object with a force accelerates as shown in the equations: (the picture) Mass of the mug,m=0.27kg -Since the diver cannot gain angular momentum in the air he must take off with sufficient angular momentum to complete the required number of rotations. Right Ch. A car with a mass of 1000.0 kg accelerates from 0 to 90.0 km/h in 10.0 s. (a) What is its acceleration? How much force musthe apply to the sled? 5 - A light block of mass m and a heavy block of mass Ch. I = mr2 T = Fd Watch these videos for an in-depth look. How much force must he apply to the sled? He is standing on a Ch. A block of mass 3m is placed on a frictionless horizontal surface, and a second block of mass m is placed on top of the first block. The ramp is tilted at 20 and is frictionless. Try it in the Numerade app? Limbs move in the direction opposite the applied force - Eccentric muscle action (negative work) (b) If all other conditions are the same but the ramp has a friction force of 1.9 N, what is the acceleration? mass of block , m = 2.0 kg 5 - Three objects move through the air as shown in Ch. C.600 N horizontal force P. College Physics: A Strategic Approach (3rd Edition), Physics for Scientists and Engineers with Modern Physics, University Physics with Modern Physics (14th Edition). -a mechanical advantage greater than 1.0 allows the force applied (muscle) to be less than the resistive force to produce an equal amount of torque 5 - A wood block, after being given a starting push, Ch. -The more massive an object is, the greater is the force required to produce a given acceleration Balanced OR Unbalanced Suppose a 60.0-kg gymnast climbs a rope. Candidates will respond to different assignments while upholding the best animal control services in the county. (90 kg)(+6 m/s) + (80 kg)(-7 m/s) = (170 kg)(v). Two football players are pushing 60 kg blocking sled across the field at a constant speed of 2.0 m/s. Free body diagram, Q:Q5) A child pulls a wagon with a force of 20N by a rope making an angle of 25 18 N B. How much force must he apply to the sled? *Response times may vary by subject and question complexity. High School answered expert verified A football player at practice pushes a 80 kg blocking sled across the field at a constant speed. 5 - Section 5.2 Dynamics and Newtons Second Law 9. a. How much force must he apply to the sled. B9., Q:Q1: Calculate the force necessary Start your trial now! Ability of a body to return to its original state if its disturbed The figure below represents a cart viewed from above being pulled by two children (PLS HELP ME NOW!!!!!) Get 5 free video unlocks on our app with code GOMOBILE. The coefficient of kinetic friction between the grass and the sled is 0.30. A boy kicks a football with a force of 20 N, the time the force acts for is 0.3 s. Calculate the impulse on the ball. A football player at practice pushes a 60 kg blocking sled across the field at a constant speed. Draw a free-body diagram of the dress. a. A1,100 kg car comes uniformly to a stop. The coefficient of kinetic friction between the grass and the sled is 0.30. How much force must he apply to the sled?A. K = 0.30, 2. e = hb/hd (a) If the crate doesnt move, whats the magnitude of the static friction force? 1 W = 1 J/s Mathematical Methods in the Physical Sciences, David Halliday, Jearl Walker, Robert Resnick, Alan Giambattista, Betty Richardson, Robert Richardson. Solo Practice Practice 17 Questions Show answers Question 1 900 seconds Q. A small rock (m-3 kg) and a car (m-1000 kg) stay still on flat ground. The coefficient of kinetic friction between the grass and the sled is 0.30. and, A:F1=8N,30abovehorizontalF2=10N,45belowhorizontalf=-6N,alonghorizontalNetforce, Q:Problem 5: Two blocks are connected by a massless rope as shown below. a=Fforward-Fresistivem=1950N-1200N1100kg=0.6818ms2 The scale reads 800 N. (a) What is the person's mass? A. A box rests on the back of a truck. of an applied, A:Letthemassofblock=mVelocityofblock=ConstantAppliedforce=Fapp, Q:(I) Sketch the free-body diagram of a baseball (a) at the moment it is hit by the bat, and again (b), A:Part (a) 5 - A wood block is sliding up a wood ramp. The surfaces of the blocks are rough. a., Q:A 12.23 kg box made of rubber is on dry asphalt at rest. Status. m.a= Fnet The wheels of a midsize car exert a force of 2100 N backward on the road to accelerate the car in the forward direction. A. 5 - A football player at practice pushes a 60 kg Ch. A football player at practice pushes a 60 kg blocking sled across the field at a constant speed. Draw K = 0.30 2. Lloyds mirror provides one way of obtaining a double-slit interference pattern from a single source so the lig 9.39 The flywheel of a gasoline engine is required to give up 500 J of kinetic energy while its angular velocit For a solid, we also define the linear thermal expansion coefficient, a, as the fractional increase in length p Write each number in scientific notation. The coefficient, Q:3. What does the scale read now? (b) What is the size of the force acting on it? 17 N b. 5 - The ramp in Figure P5.75 is frictionless. View this solution and millions of others when you join today! When the bat hits the baseball, two forces act on the ball: First week only $4.99! 60 N C. 180 N D. 600 N William Moebs, Samuel J. Ling, Jeff Sanny. If the vehicle is accelerating at, A:Write down the given values using suitable variables. Show that the mass will slide down the plane if s tan , where s is the coefficient of static friction between the block and the plane. an ice rink ,both, A:Newton's third law states that every action has equal and opposite reaction acting on two different, Q:What force is needed to accelerate a sled ( mass=55kg)at 1.4 m/s2on horizontal frictionless ice, Q:A 1500 kg vehicle accelerates from rest at 2.5 m/s. -90 mph pitch will not slow down unless force is applied. 5 - A 22-cm-diameter bowling ball has a terminal speed Ch. A constant force of magnitude F is applied to the first block as in Figure P4.68. 5 - Figure P5.49 shows the velocity graph of a 2.0 kg Ch. Two blocks, A of mass 10 kg and B of mass 30 kg, are side by side and in contact Acceleration (a) = -30 m/s2, Q:A car of mass 1600 kg begins to roll down a hill which is inclined at 15 degrees from the ground., Q:You push a box with a force of 200 N. It slides with a constant velocity across the floor. Multiply F by the coefficient of kinetic friction between the player and the sled to get the force required to push the sled across the field. Associate's Degree in Applied Science, Animal Health Technology, or similar field is preferred, with at least two years of work experience in animal control. How much force must he apply to the sled? A 1100-kg car pulls a boat on a trailer. What is an example of law of acceleration? 5 - Your forehead can withstand a force of about 6.0 Ch. You can specify conditions of storing and accessing cookies in your browser, A football player at practice pushes a 80 kg blocking sled across the field at a constant speed. 60 N Kf C. 180 N | 60kg D. 600 N Disti Show transcribed image text Expert Answer Dear If a 100 kg footbalil player only pushes horizontally Snapsolve any problem by taking a picture. What is linear momentum and calculating it? 5 - Figure P5.23 shows the velocity graph of a 75 kg Ch. [units: kg m2] 5 - A 2.7 g Ping-Pong ball has a diameter of 4.0 cm. Ch. answer choices 1 Ns 6 Ns 33.3 Ns Question 2 900 seconds Q. 0.68 m C.1.0 m D. 6.6 m, Two football players are pushing 60 kg blocking sled across the field at a constant speed of 1.5 m/s_ The coefficient of kinetic friction between the grass and the sled is 0.30. F = 400 N, Educator app for (b) What is the size of the force acting on it? P = power Once they stop pushing; how far will the sled slide before coming to rest? Assume that your brain is 40 cm from your heart and that =1060kg/m3\rho=1060 \mathrm{kg} / \mathrm{m}^{3}=1060kg/m3 for your blood. 5 - A truck is traveling at 30 m/s on a slippery road. Ch. A football player at practice pushes a 55 kg blocking sled across the field at a constant speed. Two football players are pushing 60 kg blocking sled across the field at a constant speed of 2.0 m/s. (a) If the crate doesnt move, whats the magnitude of the static friction force? (a) What Is the acceleration of the crate? For most people, a systolic pressure less than 90 mm Hg is considered low. -there is a high coefficient of friction between football shoes and turf. (a) What is the acceleration of the freight car? How much force must he apply to the sled 1 See answer Advertisement okpalawalter8 Answer: The value is Explanation: (b) What is the force in the hitch between the car and the trailer if 80% of the resisting forces are experienced by the boat and trailer? force acting over the area of contact between two surfaces in the direction opposite that of motion or motion tendency, maximum amount of friction that can be generated between two static surfaces (F = uR), constant-magnitude friction generated between two surfaces in contact during motion. 5 - Two blocks are connected by a string as in Figure Ch. Mass of sled A 7.0-N force parallel to an incline is applied to a 1.0-kg crate. A spring is stretched by applying a force to it by hands. If you want any, Q:A car has forces acting on it, as shown below. 0.875. P = W/t Here,F1 is the, Q:A 20 kg box rests on a table. How does power relate to force and velocity? 60 N C. 180 N D. 600 N. Enter your parent or guardians email address: By clicking Sign up you accept Numerade's Terms of Service and Privacy Policy, Educator app for (c) What does the scale read if the elevator moves upward at constant velocity? hb = height to which ball bounces Note: Normally, your blood vessels constrict and expand to keep your brain blood pressure stable when you change your posture. m = mass of block. (a) What Is the acceleration of the crate? A farmer pulls the leash of a stubborn, 200 kg pig What is her Ch. What are some examples of the law of inertia? Postural hypotension is the occurrence of low (systolic) blood pressure when standing up too quickly from a reclined position, causing fainting or lightheadedness. Force exerted on the object 20 N As a baseball is being caught, its speed goes from 30 to 0 m/s in about 0.005 s. Its mass is 0.145 kg. magnitude of each object's velocity is the same after impact as before, but direction changes s = 0.65 m 5 - A 75 kg passenger is seated in a cage in the Sling Ch. A Suppose you place a block of mass M on a plane inclined at an angle . Acceleration of the boat The box is not moving. H = mk2w. 5 - The 100 kg block in Figure P5.76 takes 6.0 s to Ch. EX: while standing or sitting on a swiveling chair (rotate your upper body in 1 direction -> chair + lower body rotate in the opposite direction) 5 - Raindrops can fall at different speeds; some fall Ch. An object is at rest an will remain at rest, Ability to resist a disruption of equilibrium A football player at practice pushes a 60 kg blocking sled across the field at a constant speed. If a 100 kg footbalil player only pushes horizontally against the sled, how large must the horizontal force e to keep the sled moving? Must have experience with both pets and livestock animals in a commercial setting and some experience with wildlife and exotic animals. Draw a free body, Q:April works at the grocery store. The coefficient of kinetic friction between the grass and the sled is 0.30. 5 - A 3.0 kg puck slides due east on a horizontal Ch. Median response time is 34 minutes for paid subscribers and may be longer for promotional offers. (b) What is the minimum possible value of the coefficient of static friction between the crate and the floor? Given quantities: SALARY. A.ON B. 60 N C. 180 N D. 600 N Expert Solution Want to see the full answer? How much force must he apply to the sled? Q:(1) A mug rests on an inclined surface, as shown. The coefficient of kinetic friction between the grass and the sled is 0.30. AGARWAL-PHY-166 5 - A fisherman has caught a very large, 5.0 kg fish Ch. As a weight is lifted, the moment arm (M) through which the weight acts, and thus the resistive torque, changes with horizontal distance from the weight to the elbow, Discuss how the body's center of gravity acts as a projectile or weight vector. 2 TO Ospreys are birds that eat fish. Acceleration (a) = 2.5 m/s2 Free body, Q:O Little Mike (mMike = 21.2 kg) is on a swing and is pulled back by Cathy with a force of F A football player at practice pushes a 80 kg blocking sled across the field at a constant speed.