COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 5, Problem 56QAP
To determine
The force, parallel to the surface of the hill, required to increase the girls speed(constant speed) to
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A 5.00 kg box sits at rest at the bottom of a ramp that is 8.00 m long and is inclined at 30 degrees above the horizontal. The coefficent of kinetic friction between the box and the surface is 0.40, and coefficent of static friction is 0.43. What constant force F, applied parallel to the surface of the ramp, is required to push the box to the top of the ramp in a time of 6.00 seconds?
A 5.00 kg box sits at rest at the bottom of a ramp that is 8.00 m long and is inclined at 30.0 above the horizontal. The coefficient of kinetic friction is mk = 0.40, and the coefficient of static friction is ms = 0.43. What constant force F, applied parallel to the surface of the ramp, is required to push the box to the top of the ramp in a time of 6.00 s?
An 8.00 kg box sits on a ramp that is inclined at 33.0 above the horizontal. The coefficient of kinetic friction between the box and the surface of the ramp is mk = 0.300. A constant horizontal force F = 26.0 N is applied to the box, and the box moves down the ramp. If the box is initially at rest, what is its speed 2.00 s after the force is applied?
Chapter 5 Solutions
COLLEGE PHYSICS
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- You are driving through the Ouachita Mountains at 12m/s. You see a maple-leaf oak (Quercus acerifolia) crossing the road and hit the brakes, 20m away. The coefficient of kinetic friction between your tires and the road is μ_k = 0.7. Will you strike this endangered broadleaf? Justify your answer with a calculation.Your final answer should be the distance you will travel before coming to a stop.arrow_forwardSisyphus was a character in Greek mythology and was doomed in Hades to push a boulder to the top of a steep mountain. When he reached the top, the boulder would roll back down the mountain and he would have to start all over again. The coefficient of static friction between the boulder and the mountainside is 0.200, the mass of the boulder is 136kg (300 lbs), and the slope of the mountain is a constant 30.00. What is the force in pounds that Sisyphus must exert on the boulder to move it up the mountain at a constant velocity?arrow_forwardKarev is lowering two boxes, one on top of the other, down the ramp, as shown in the figure, by pulling on a rope parallel to the surface of the ramp. Both boxes move together at a constant speed of 15 cm/s. The coefficient of kinetic friction between the ramp and the lower box is 0.444, and the coefficient of static friction between the two boxes is 0.800. (b) What are the magnitude of the friction force on the upper box?arrow_forward
- A box of mass m = 20.0 kg is pulled up a ramp that is inclined at an angle 0 = 15.0° angle with respect to the horizontal. The coefficient of kinetic friction between the box and the ramp is µ = 0.335, and the rope pulling the box is parallel to the ramp. If the box accelerates up the ramp at a rate of a = 2.89 m/s?, calculate the tension Fr in the rope. Use g = 9.81 m/s? for the acceleration due to gravity. Fr =arrow_forwardIt was a snow day, so Eric and some friends went sledding. He boarded his 60-inch sled and descended the steepest section near the tall trees. Before his ride ended at the location of a tree stump buried a few inches below the snow, he was accelerating at 2.66 m/s/s down the 18.9° incline. Determine the coefficient of friction between the sled and the snow. (Coefficients of friction are positive, so use the absolute value of your answer.) Use the approximation g = 10 m/s2.arrow_forwardYou find it takes 190 N of horizontal force to move an unloaded pickup truck along a level road at a speed of 2.4 m/s . You then load up the pickup and pump up its tires so that its total weight increases by 42%while the coefficient of rolling friction decreases by 19%. Now what horizontal force will you need to move the pickup along the same road at the same speed? The speed is low enough that you can ignore air resistance..arrow_forward
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