Q49 of 124 Page 56

When a rubber balloon held between the hands is pressed, its shape changes. This happens because:

A. Balanced forces act on the balloon


B. Unbalanced forces act on the balloon


C. Frictional forces act on the balloon


D. Gravitational forces act on the balloon

As the balanced forces cause the change in shape of an object without bringing a change to its motion.

More from this chapter

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47

If we release a magnet held in out hand, it falls to the ground. The force which makes the magnet fall down is an example of:

A. Balanced force


B. Unbalanced force


C. Magnetic force


D. Muscular force

 48

The inertia of a moving object depends on:

A. Momentum of the object


B. Speed of the object


C. Mass of the object


D. Shape of the object

 50

Which of the following effect cannot be produced by unbalanced force acting on a body?

A. Change in speed of the body


B. Change in shape of the body


C. Change in direction of motion of the body


D. Change in state of rest of the body

 51

A plastic ball and a clay ball of equal masses, travelling in the same direction with equal speeds, strike against a vertical wall. From which ball does the wall receive a greater amount of momentum?