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A force vec F=(2hati+2hatk) N displaces ...

A force `vec F=(2hati+2hatk)` N displaces a body by an amount `vec S=(2hati+2hatj)` m in 8 s. What is the power developed ?

A

0.25 W

B

0.75 W

C

1.25 W

D

0.5 W

Text Solution

Verified by Experts

The correct Answer is:
D
Power `=("Work done")/("Time") and W = vec F cdot vec S =(2hati + 2hatk) cdot (2hati +2hatj) =4 J`
`therefore P =(4)/(8) =0.5 J//s =0.5` watt
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