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Q.

[7]

An object is moving on a circular path of radius 21 m with a velocity of 2 m/s. Time taken by the body to complete the half revolution is [[1]] s.


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Detailed Solution

An object is moving on a circular path of radius 21 m with a velocity of 2 m/s. Time taken by the body to complete the half revolution is 33s.
Given,
Radius of the object r=21 m Velocity of the object v=2 m/s
Distance travelled by the object to complete half revolution is half of circumference of circular path  =2πr2 ⇒    = πr
Distance = 3.14×21 m= 65.94 m
Time taken = Distance travelledSpeed of object
 t= 65.942 
  t≈ 33 seconds
 
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