Question

Give reasons.


a. The motion of the hands of a clock is an example of circular motion

b. We need standard units of measurement.

c. Rest and motion are relative terms.
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Answer 1

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Answer 2

• Moving clock hands execute periodic motion,circular motion. In physics, a motion that is repeated at equal intervals of time is called as periodic motion. Since the clock hands move in a circular direction, they are said to be in circular or rotational motion.

• We need standard unit for measurement to make our judgement more reliable and accurate. For proper dealing, measurement should be same for everybody

• We need standard unit for measurement to make our judgement more reliable and accurate. For proper dealing, measurement should be same for everybody