Physics
Grade-10
Easy
Question
A boy moves a tied stone above his head in circles, what is the time period of circular motion if it forms a circle of 20 cm radius. The speed of rotation is 23 m/s.
- 0.25 s
- Sqrt (0.05) s
- 0.05 s
- 0.1 s
Hint:
Use,
T = 
The correct answer is: 0.05 s
Speed, v = 23 m/s
Time period, T =
= 0.05 s
Hence option 3 is correct.
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