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Force vec(F ) = (60 hat(i) +50 hat(j)-3h...

Force `vec(F ) = (60 hat(i) +50 hat(j)-3hat(k))N ` is applied on a particle , the value of velocity is `vec(v) =(2hat(i)+4hat(j)+5hat(k))` m/s , then power will be `…….` W.

A

305

B

450

C

45

D

90

Text Solution

Verified by Experts

The correct Answer is:
C
`P = vec(F) .vec(v) = (60 hat(i)+15 hat(j)-3hat(k)).(2hat(i)-4hat(j)+5hat(k))`
`= 120 - 60 - 15`
= 45 W .
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