Q37 of 124 Page 56

| Define the term ‘force.’

A push or pull is a force. Or in other words we can say that force is the capacity to do work or cause any physical change.


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36

Define momentum of a body, on what factors does the momentum of a body depend?

 36

Calculate the change in momentum of a body weighing 5 kg when its velocity decreases from 20 m/s to 0.20 m/s.

 37

State the various effects of force.

 38

Give one example each where:

(a) A force moves a stationary body.


(b) A force stops a moving body.


(c) A force changes the speed of a moving body.


(d) A force changes the direction of a moving body.


(e) A force changes the shape (and size) of a body.