Rotational Motion Question 93

Question: A solid sphere is in rolling motion. In rolling motion a body possesses translational kinetic energy (Kt) as well as rotational kinetic energy (Kr) simultaneously. The ratio Kt:(Kt+Kr) for the sphere is

Options:

A) 10 : 7

B) 5 : 7

C) 7 : 10

D) (4) 2 : 5

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Answer:

Correct Answer: B

Solution:

  • [b]

    Kt=12mv2

    Kt+Kr=12mv2+12|ω2=12mv2+12(25mr2)(vr)2

    =710mv2



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