Physics
Grade-10
Easy
Question
Richa is sitting in a merry-go-round. The time period of circular motion if it forms a circle of 56 m radius. The speed of rotation is 40 m/s.
- 2.8 pi s
- 280 pi s
- 0.14 pi s
- 28 pi s
Hint:
Using formula for time period of uniform circular motion.
The correct answer is: 2.8 pi s
Speed, v = 40 m/s
Time period, t = ?
Radius, r = 56 m
So, 
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