Chapter 9, Problem 1A

A force sets an object in motion. When the force is multiplied by the time of its application, we call the quantity impulse, which changes the momentum of that object. What do we call the quantity $force\times distance$, and what quantity can this change?

To determine

To define: The name of the quantity obtained by the product of force and distance travelled. Also, specify the quantity that can be changed by the product of force and distance.

Answer to Problem 1A

The product of force and distance travelled is termed as work done.

This can change the energy of an object

Explanation of Solution

Introduction:

Work done of an object can by defined as the product of the force applied and the displacement of the body. Its S.I. unit is Joule.

Work done can be given as:

  $W=Fs$

Where,

  $W$ is the work done

  $F$ is the applied force

  $s$ is the displacement

Energy of a body is defined as the capacity of that body to do a work. And it is measured by the total amount of work done by that body. SI unit of energy is Joule.

Therefore, change in the work done will results in the change in the energy of that body.

Conclusion:

Work done is the quantity represents by the product of the force and distance. And this quantity can change the energy of the object.