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QNEET-2018-Ph-899: NEET 2018 Physics - Class 11 NEET-2018-Ph-899 Solution: A solid sphere is in rolling motion. In rolling motion a body…
A solid sphere is in rolling motion. In rolling motion a body possesses translational kinetic energy () as well as rotational kinetic energy () simultaneously. The ratio for the sphere is 7:10 5:7 10:7 2:5
Multiple Choice Options
- A 7:10
- B 5:07
- C 10:07
- D 2:05
Step-by-Step Verified Solution
In rolling motion,
Translational kinetic energy, K t = 1 2 m v 2
Rotational kinetic energy, K r = 1 2 I _ 2
_ K t + K r = 1 2 m v 2 + 1 2 I _ 2
= 1 2 m v 2 + 1 2 ( 2 5 m r 2 ) ( v r ) 2
= 7 10 m v 2
_ K t K t + K r = 1 2 m v 2 7 10 m v 2 = 5 7