A wheel turning with angular speed of 30 rev/s, is brought to rest with a constant acceleration. It turns 60 rev before it stops the time that elapses before it stops is

Question:

4.A wheel turning with angular speed of 30 rev/s, is brought to rest with a constant acceleration. It turns 60 rev before it stops the time that elapses before it stops is

Options :

a) 2s
b) 4s
c) 5s
d) 6s

Answer :

b) 4s

Answer Steps :

Step1 :-

Step2 :-

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Forty electric bulbs are connected in series across a 220 V supply. After one bulb is fused, the remaining 39 are connected again in series across the same supply. The illumination will be

If a body is executing simple harmonic motion then

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