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A constant force vecA =-hati +2hatj+3hat...

A constant force `vecA =-hati +2hatj+3hatkN` acts on a body, and shifts it 4 m along z-axis and then 3m along y-axis.
Work done by `vecF` will be

A

6J

B

12J

C

18 J

D

24 J

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

  • A body of mass 1kg begins to move under the action of a time dependent force vecF =(2thati+3t^2hatj)N where hati and hatj are unit vectors along x and y-axis . What power will be developed by the force at the time t ?

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    D
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  • A particle moving on xy-plane is acted upon by a force vecF =-K(yhati+xhatj) where K is a constant . Starting from the origin , the particle si brought to the point (a,0) along the positive x-axis and then to the point (a,a) parallel to y-axis. Work done by the force on the particle will be

    A
    `-2 Ka^2`
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