Question

under what condition the work done by a force is (I) maximum (ii) minimum

Answer 1

Work done is maximum when andle between force and displacement is zero
W=Fdcos (0)
cos zero =1
W=Fd
it means maximum work
work done is minimum when angle between force and displacement is 90°
W=Fdcos(90)

cis 90 =0
W=Fd(0)
W=o
Minimum work done at 90°

Answer 2

1. The direction in which work is done and force is also same direction in this case work max..

2. The direction in which work is done and force in opposite direction in this case minimum