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A particle moves with a velocity v=(5hat...

A particle moves with a velocity `v=(5hati-3hatj + 6hatk) ms^(-1)` under the influence of a constant force
`F =(10hati + 10hatj + 20hath) N`, the instantaneous power applied to the particle is.

A

200 `Js^(-1)`

B

40 `Js^(-1)`

C

140 `Js^(-1)`

D

170 `Js^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
C
`P=F.v=(10hati+10hatj+20hatk).(5hati-3hatj+6hatk)`
`=50-30+120=140" Js^(-1)`
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