The moment of inertia of a body about a given axis is 1.2 kg m−−−
2
. To produce a rotational kinetic energy of
1500 J an angular acceleration of 25 rad/ s2 must be applied for :
a) 8.5 s b) 5 s
c) 2 s d) 1 s
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The moment of inertia of a body about a given axis is 1.2 kg m−−−
2
. To produce a rotational kinetic energy of
1500 J an angular acceleration of 25 rad/ s2 must be applied for :
a) 8.5 s b) 5 s
c) 2 s d) 1 s
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Answer:
KE=Iw^2/2
From there w=50
After that w=alphat
Then t=2sec(c) option