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A table clock has its minutte hand 4.0 c...

A table clock has its minutte hand 4.0 cm long. Find the average velocity of the tip of the minute hand a. between 6.00 a.m. to 6.30 a.m. and b. between 6.00 a.m. to 6.30 p.m.

Text Solution

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At 6.00 a.m. the minute hand is at 12 mark and at 6.30 p.m is `180^(@)` away.
Thus displacement `= R + R = 2R = 2 xx 5 = 10 cm`
Time taken from 6.00 a.m. to 6.30 p.m is 12 hour and 30 minute = 45000s.
The average velocity `= V_(av) =(10)/(45000) =2.2xx10^(-4) cm//s`
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