Q37 of 124 Page 56

State the various effects of force.

The Effects of Forces are - force acting on an object may cause the object to change shape, to start moving, to stop moving, to accelerate or decelerate.

When two objects interact with each other they exert a force on each other, the forces are equal in size but opposite in direction.


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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

| Define the term ‘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.

 39

What do you understand by the terms “balanced forces” and “unbalanced forces”? Explain with examples.