COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 4, Problem 58QAP
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Draw a free body diagram for a box pushed horizontally across a frictionless smooth floor with steadily increased speed
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Chapter 4 Solutions
COLLEGE PHYSICS
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- A box rests on the (horizontal) back of a truck. The coefficient of static friction between the box and the surface on which it rests is 0.24. What maximum distance can the truck travel (starting from rest and moving horizontally with constant acceleration) in 3.0 s without having the box slide?arrow_forwardAn automobile driver traveling down an 8% grade slams on his brakes and skids 30 m before hitting a parked car. A lawyer hires an expert who measures the coefficient of kinetic friction between the tires and road to be k = 0.45. Is the lawyer correct to accuse the driver of exceeding the 25-MPH speed limit? Explain.arrow_forwardWhen you learn to drive, you discover that you need to let up slightly on the brake pedal as you come to a stop or the car will stop with a jerk. Explain this in terms of the relationship between static and kinetic friction.arrow_forward
- Two blocks of unequal mass are connected by a string over a smooth pulley (Figure 2 B). If the coefficient of kinetic friction is μk, what angle θ of the incline allows the masses to move at a constant speed? FIGURE 2-B Problem 2-32.arrow_forwardWhen you learn to drive, you discover that you need to up slightly on the brake pedal as you come to a stop or the car will stop with a jerk. Explain this in terms of the relationship between static and friction.arrow_forwardA 3.0 kg cinder block is dragged down a ( horizontal) picnic table. If the coefficient of kinetic friction is 0.8 what us the friction force on the block ? Can you please explain the process, thanksarrow_forward
- A 2.17-kg object is situated at rest on a horizontal surface with a static friction coefficient of 0.56. Calculate the maximum force of the static friction.arrow_forwardSuppose a 74 kg sprinter, starting from rest, runs the first 9 m in 3 seconds at constant acceleration, a reasonable model. What is the magnitude of the horizontal ground force acting on the sprinter?arrow_forwardA box with mass 13.0 kg moves on a ramp that is inclined at an angle of 55.0∘ above the horizontal. The coefficient of kinetic friction between the box and the ramp surface is μk = 0.300. a. Calculate the magnitude of the acceleration of the box if you push on the box with a constant force 150.0 N that is parallel to the ramp surface and directed down the ramp, moving the box down the ramp. b. Calculate the magnitude of the acceleration of the box if you push on the box with a constant force 150.0 N that is parallel to the ramp surface and directed up the ramp, moving the box up the ramp.arrow_forward
- A pickup truck carries cans of paint in the back bed. The coefficient of static friction between the cans and the bed of the truck is 0.30. There is no back gate to the truck. How long should the driver take to accelerate to a speed of 65 mi/h to avoid losing the paint cans out of the rear of the truck?arrow_forwardThe citizen's car is a 1700-kg Mercedes-Benz 300SL. The citizen manages to park his car next to the express on a highway that rises 15* above the horizontal. The coefficient of kinetic friction between the tires of the car and the road is 0.14. (a) Calculate the magnitudes of the normal forces and the static friction force exerted by the soil on the tires. (b) If at the moment the brakes that hold the car at rest give way and the car begins to move downhill, determine the acceleration and average force with which the car reaches the end of the hill.arrow_forwardA force F is applied to an 22 kg block against the wall at an angle of θ=45°. The friction coefficient between the wall and the block is 0.3. If the block is observed to accelerate upward at 1.0 m/s/s, determine the magnitude of the force F.arrow_forward
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Newton's Second Law of Motion: F = ma; Author: Professor Dave explains;https://www.youtube.com/watch?v=xzA6IBWUEDE;License: Standard YouTube License, CC-BY