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Question

The tip of the seconds hand of a clock takes 60 seconds to move once on the circular dial of the clock. If the radius of the dial of the clock be 10.5 cm then calculate the speed of the tip of the seconds hand.

A
1.1 m/s
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B
2.2 m/s
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C
0.011 m/s
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D
0.11 m/s
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Solution

The correct option is C 0.011 m/s
We know that,

Speed=Total distanceTotal time

v=2πrt=2×227×10.560=1.1 cm/s=0.011 m/s

Hence, option (C) is the correct answer.

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