Question

The minute hand of a clock is 7 cm long. find the displacement & distance covered by it from 9:00 a.m. to 9:30 a.m

Answer 1

Answer:

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Answer 2

Since, the clock is moved from 9:00 to 9:30, the minute arm has traveled and completed a semi circle to reach 9:30. So, the the distance covered by the minute arm will be the arc from 9:00 to 9:30. The displacement will be the diameter of the swept area of the minute arm which will be 14 cm,

The, distance will be π×r where r is the radius or the length of the minute arm.

On solving we will get distance to be 22/7×7 = 22 cm.

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