COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 5, Problem 34QAP
To determine
(a)
Magnitude of the coefficient of kinetic friction of a book as it slides across a tabletop
To determine
(b)
The magnitude of the coefficient of static friction for the same book on the same table top
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A box of banana weighing 40.0 N rests on a horizontal surface. The
coefficient of static friction between the box and the surface is 0.40,
and the coefficient of kinetic friction is 0.20.
(a) If no horizontal force is applied to the box and the box is at rest,
how large is the friction force exerted on the box?
(b) What is the magnitude of the friction force if a monkey applies a
horizontal force of 6.0 N to the box and the box is initially at rest?
(c) What minimum horizontal force must the monkey apply to start the
box in motion?
(d) What minimum horizontal force must the monkey apply to keep the
box moving at constant velocity once it has been started?
(e) if the monkey applies a horizontal force of 18.0 N, what is the
magnitude of the friction force and what is the box's acceleration?
A box of bananas weighing 40.0 N rests on a horizontal surface.The coefficient of static friction between the box and the surfaceis 0.40, and the coefficient of kinetic friction is 0.20. If no horizontal force is applied to the box and the box is at rest, how large is the friction force exerted on it?
A tool box of weighing 50.0 N rests on a horizontal surface. The coefficient of static friction between the box and the surface is 0.40, and the coefficient of kinetic friction is 0.20. If no horizontal force is applied to the box and the box is at rest, how large is the friction force exerted on the box?
Chapter 5 Solutions
COLLEGE PHYSICS
Ch. 5 - Prob. 1QAPCh. 5 - Prob. 2QAPCh. 5 - Prob. 3QAPCh. 5 - Prob. 4QAPCh. 5 - Prob. 5QAPCh. 5 - Prob. 6QAPCh. 5 - Prob. 7QAPCh. 5 - Prob. 8QAPCh. 5 - Prob. 9QAPCh. 5 - Prob. 10QAP
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- Why is the following situation impossible? Your 3.80-kg physics book is placed next to you on the horizontal seat of your car. The coefficient of static friction between the book and the seat is 0.650, and the coefficient of kinetic friction is 0.550. You are traveling forward at 72.0 km/h and brake to a stop with constant acceleration over a distance of 30.0 m. Your physics book remains on the seat rather than sliding forward onto the floor.arrow_forwardA crate remains stationary after it has been placed on a ramp inclined at an angle with the horizontal. Which of the following statements must be true about the magnitude of the frictional force that acts on the crate? (a) It is larger than the weight of the crate. (b) It is at least equal to the weight of the crate. (c) It is equal to sn. (d) It is greater than the component of the gravitational force acting down the ramp. (e) It is equal to the component of the gravitational force acting down the ramp.arrow_forwardA woman holds a book by placing it between her hands such that she presses at right angles to the front and back covers. The book has a mass of m = 1.7 kg and the coefficient of static friction between her hand and the book is μs = 0.59. Force minimum?arrow_forward
- A bedroom bureau with a mass of 45 kg, including drawers and clothing, rests on the floor. (a) If the coefficient of static friction between the bureau and the floor is 0.45, what is the magnitude of the minimum horizontal force that a person must apply to start the bureau moving? (b) If the drawers and clothing, with 17 kg mass, are removed before the bureau is pushed, what is the new minimum magnitude?arrow_forwardA box of bananas weighing 40.0 N rests on a horizontal surface. The coefficient of static friction between the box and the surface is 0.40, and the coefficient of kinetic friction is 0.20. (a) If no horizontal force is applied to the box and the box is at rest, how large is the friction force exerted on it? (b) What is the magnitude of the friction force if a monkey applies a horizontal force of 6.0 N to the box and the box is initially at rest? (c) What minimum horizontal force must the monkey apply to start the box in motion? (d) What minimum horizontal force must the monkey apply to keep the box moving at constant velocity once it has been started? (e) If the monkey applies a horizontal force of 18.0 N, what is the magnitude of the friction force and what is the box’s acceleration?arrow_forwardA 3 kg box rests on a horizontal table. It is attached to a 2 kg box via a pulley. The 2 kg box hangs over the edge of the table. The 2 kg box is 2 meters from the ground. a) What is the minimum coefficient of static friction such that the objects remain at rest. b) If the coefficient of static friction is less than that in part (a) and the coefficient of kinetic friction between the box and the table is 0.30, find the time the 2 kg mass falls the 2 meters to the floor. Assume the system starts from rest.arrow_forward
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