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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