COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 5, Problem 30QAP
To determine
The value of the coefficient of kinetic friction for a box of books on a carpeted floor
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Students have asked these similar questions
The coefficient of static friction between hard rubber and normal street pavement is about 0.86.
On how steep a hill (maximum angle) can you leave a car parked?
The coefficient of static friction between hard rubberand normal street pavement is about 0.90. On how steep a hill (max angle) can you leave a car parked?
The maximum possible value for the coefficient of static friction is
a. 0.50
b. 1.00
c. a value up to but not quite 1.00
d. greater than 1.00
Chapter 5 Solutions
COLLEGE PHYSICS
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- A man exerts a horizontal force of 112 N on a refrigerator of mass 42.0 kg. If the refrigerator doesnt move, what is the minimum coefficient of static friction between the refrigerator and the floor? (See Section 4.6.)arrow_forwardKinetic friction is proportional to the normal force (Eq. 5.9). Why should there be an intimate connection between these two forces?arrow_forwardThe coefficient of static friction between the 3.00-kg crate and the 35.0 incline of Figure P4.31 is 0.300. What minimum force F must be applied to the crate perpendicular to the incline to prevent the crate from sliding down the incline? Figure P4.31arrow_forward
- The manager of a department store is pushing horizontally with a force of magnitude 200 N on a box of shirts. The box is sliding across the horizontal floor with a forward acceleration. Nothing else touches the box. What must be true about the magnitude of the force of kinetic friction acting on the box (choose one)? (a) It is greater than 200 N. (b) It is less than 200 N. (c) It is equal to 200 N. (d) None of those statements is necessarily true.arrow_forwardCalculate the force required to pull a stuffed toy duck (mass m = 1.25 kg) at a constant velocity of 3.6 m/s horizontally across the floor if the string is 50.0 above the horizontal. The coefficient of kinetic friction between the duck and the floor is 0.70.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_forward
- 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_forwardA crate of weight Fg is pushed by a force P on a horizontal floor as shown in Figure P4.83. The coefficient of static friction is s, and P is directed at angle below the horizontal. (a) Show that the minimum value of P that will move the crate is given by P=sFgsec1stan (b) Find the condition on in terms of , for which motion of the crate is impossible for any value of P. Figure P4.83arrow_forwardA helicopter with mass 2.35104kg has a position given by r(t)=(0.020t3)i +(2.2t)j -(0.060t2)k . Find the net force on the helicopter at t=3.0s .arrow_forward
- How far do they slide? The coefficient of kinetic friction between football uniforms and Astroturf is 0.30.arrow_forwardCalculate the magnitude of the acceleration of a skier sliding down a 30 degree slope assuming that there is a coefficient of kinetic friction µK = 0.1 between the skier and the snow.arrow_forwardA 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_forward
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