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Chapter 6: Q.4 (page 153)

If you know all of the forces acting on a moving object, can you tell the direction the object is moving? If yes, explain how. If no, give an example.

Short Answer

Expert verified

If all of the forces acting on the moving object are understood, it is impossible to estimate its direction.

Step by step solution

01

Introduction

Knowing all of the forces operating on the object can only establish the direction of acceleration, not the direction in which the object is travelling.

02

Explanation

The direction of motion of an object travelling at a constant speed is determined by the direction of the net force acting on it.

When the net force operating on the body is zero, the body is at rest. If the body's net force is greater than zero, the body will move in the direction of the resultant force.

As a result, even if all of the forces acting on the moving item are known, determining its direction is impossible.

03

Explanation with Example 

The example involves applying the various forces acting on the block in all directions. The resultant force will be directed in the same direction as the object's motion.

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Most popular questions from this chapter

A large box of mass Mis pulled across a horizontal, frictionless surface by a horizontal rope with tension T. A small box of mass m sits on top of the large box. The coefficients of static and kinetic friction between the two boxes are 渭sand 渭k, respectively. Find an expression for the maximum tension Tmaxfor which the small box rides on top of the large box without slipping.

A large box of mass Mis moving on a horizontal surface at speed V0 . A small box of mass m sits on top of the large box. The coefficients of static and kinetic friction between the two boxes are 渭sand 渭1, respectively. Find an expression for the shortest distancedmin in which the large box can stop without the small box slipping.

The four balls in FIGURE Q6.9 have been thrown straight up. They have the same size, but different masses. Air resistance is negligible. Rank in order, from largest to smallest, the magnitude of the net force acting on each ball. Some may be equal. Give your answer in the form a>b>c=dand explain your ranking.

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A 10kg crate is placed on a horizontal conveyor belt. The materials are such that 渭s= 0.5and 渭k= 0.3.

a. Draw a free-body diagram showing all the forces on the crate if the conveyor belt runs at constant speed.

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