Question

A force F=3i+4j newton acts on a body and produces a displacement of S=4i+KJ.The work done by the force is zero if the value of K is

Answer 1

Answer:

-3

Explanation:

w=dot product of f and s

0= ( 3i+ 4 j )(4i+ KJ)

0=3*4+4*k

0=12+4k

4k=-12

k=-3

Answer 2

Answer:

option c( _3 )

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