Question

A gardener pushes a lawn roller through a distance of 20m. If he applies a force of 2 0 kg wt in a direction inclined at 60 degree to the ground, find the work done by the gardener?

Answer 1

W= f s cos@

= 20*9.8*20*cos 60

=20*9.8*20*1/2

=20*9.8*10

=1960 J

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