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Q10.

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Physics Principles with Applications
Found in: Page 100
Physics Principles with Applications

Physics Principles with Applications

Book edition 7th
Author(s) Douglas C. Giancoli
Pages 978 pages
ISBN 978-0321625922

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Short Answer

You are pushing a heavy box across a rough floor. When you are initially pushing the box, and it accelerates,

(a) you exert a force on the box, but the box does not exert a force on you.

(b) the box is so heavy that it exerts a force on you, but you do not exert a force on the box.

(c) the force you exert on the box is greater than the force of the box exerting back on you.

(d) the force you exert on the box is equal to the force of the box exerting back on you.

(e) the force that the box exerts on you is greater than the force you exert on the box.

The correct option is (d).

See the step by step solution

Step by Step Solution

TABLE OF CONTENTS :
TABLE OF CONTENTS

Step 1. Force between you and the box

According to the third law of motion, the force you exert on the box is equal to the force exerted on you by the box.

Step 2. Other forces on the box

However, there are other forces, such as friction acting on the box. The box accelerates because there is a net force on the box due to all the force on it.

Most popular questions for Physics Textbooks

A small box is held in place against a rough vertical wall by someone pushing on it with a force directed upward at 28° above the horizontal. The coefficients of static and kinetic friction between the box and wall are 0.40 and 0.30, respectively. The box slides down unless the applied force has magnitude 23 N. What is the mass of the box?

Mary exerts an upward force of 40 N to hold a bag of groceries. Describe the “reaction” force (Newton’s third law) by stating (a) its magnitude, (b) its direction, (c) on what object it is exerted, and (d) by what object it is exerted.

The two forces F→1 and F→2, as shown in Fig. 4–52 (a) and (b), (looking down) act on an 18.5 kg object on a frictionless tabletop. If F1=10.2 N, and F2=16.0 N, find the net force on the object and its acceleration for (a) and (b).

FIGURE 4-52 Problem 28.

According to Newton’s third law, each team in a tug of war (Fig. 4–37) pulls with the force equal to that of the other team. What determines which team will win? Describe the forces on each of the teams and on the rope.

FIGURE 4-37 Question 14. A tug of war

If the acceleration of an object is zero, are no forces acting on it? Explain.
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