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Question

Which of the following example shows an object that does not change its speed but only its direction of motion?

A
Parachutist jumping out of an airplane.
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B
Uniform motion of a body along a circular path
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C
A freely falling body
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D
A car moving with uniform speed in a straight line
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Solution

The correct option is B Uniform motion of a body along a circular path
In uniform circular motion, the speed of the body remains same but its direction changes continuously.

When a parachutist jumps out of an airplane, his speed and direction changes as he falls down.

A body falling downwards has a speed that keeps increasing.

A car moving in a straight line with constant speed has the same speed. However, the direction remains the same as well.

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