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Power supplied to a mass 2 kg varies wit...

Power supplied to a mass `2 kg` varies with time as `P = (3t^(2))/(2)` watt. Here `t` is in second . If velocity of particle at `t = 0 is v = 0`, the velocity of particle at time `t = 2s` will be:

A

`2m//s`

B

`3m//s`

C

`1.5m//s`

D

`4.5m//s`

Text Solution

Verified by Experts

The correct Answer is:
A
`P=(W)/(t)=(mgh)/(t)=(100xx10xx100)/(0.5)`
`=2xx10^(5)"watt "` (1 Quintal = 100 kg)
But the efficiency is 60%.
`therefore` The power of the engine should be `=(100)/(60)(P)`
`=(2xx10^(5)xx100)/(60)=3.33xx10^(5)N div 330 kW`
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