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प्रश्न
An object is rolling without slipping on a horizontal surface and its rotational kinetic energy is two-thirds of translational kinetic energy. The body is ______.
विकल्प
disc
solid sphere
hollow cylinder
spherical shell
MCQ
रिक्त स्थान भरें
उत्तर
An object is rolling without slipping on a horizontal surface and its rotational kinetic energy is two-thirds of translational kinetic energy. The body is spherical shell.
Explanation:
Rotational kinetic energy = `2/3` translational kinetic energy ...(given)
`1/2 "mv"^2 ("K"^2/"R"^2) = 2/3 xx 1/2 "mv"^2`
`"K"^2/"R"^2 = 2/3` = Hollow sphere or spherical shell
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