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प्रश्न
A particle performs uniform circular motion in a horizontal plane. The radius of the circle is 8 cm. The centripetal force acting on the particle is 15 N. Its kinetic energy is ____________.
विकल्प
0.1 J
0.2 J
2.0 J
0.6 J
MCQ
रिक्त स्थान भरें
उत्तर
A particle performs uniform circular motion in a horizontal plane. The radius of the circle is 8 cm. The centripetal force acting on the particle is 15 N. Its kinetic energy is 0.6 J.
Explanation:
r = 8 cm= 8 x 10-2 m = 0.08 m
`"Using, F" = "mv"^2/"r" = 15`
`therefore 1/2 "mv"^2`
` = 15 xx "r"/2`
` = 15 xx 0.08/2`
` = 0.6 "J"`
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