the length of a minute hand of a clockis 7 cm. Find out the average speed and average velocity(incm/min) of the tip of the minute hand when it movesduring a time interval from 3: 15 pm to 3: 45 pm?
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Answer:
The distance moved by tip of minutes hand when it moves during a time interval from 3 p.m. to 3.45 p.m. is rθ
where, r = length of minute hand
θ = angle moved by minutes hand
⇒ Distance covered =4×
2
3π
=6πcm
⇒distance=6πcm=0.06πm
⇒velocity=
time
distance
⇒velocity=
45×60
0.06π
=69.7×10
−5
ms
−1
Answered by
0
The distance moved by tip of minutes hand when it moves during a time interval from 3 p.m. to 3.45 p.m. is rθ
where, r = length of minute hand
θ = angle moved by minutes hand
⇒ Distance covered =4×
2
3π
=6πcm
⇒distance=6πcm=0.06πm
⇒velocity=
time
distance
⇒velocity=
45×60
0.06π
=69.7×10
−5
ms
−1
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