Question

a machine exerts pressure of 900N to pull a body through a distance of 10m in 30sec.calculate the work done and power of machine?

Answer 1

Work done =  Force x Displacement

W.D = 9000N x 10m  USE YOUR CALCULATOR


POWER= W.D/TIME GIVEN USE YOUR CALCULATOR

Simple

Answer 2

First of all we have to find work done

force = 900 N

distance = 10 m

work done = force * distance

                  = 900 * 10

                  = 9000 J

hence the work done by a body is 9000 J .

Then we have to find power a machine

time = 30 sec

work  = 9000 J

power = work / time

           = 9000 / 30

           = 300 W

hence the power of machine is 300 W

hope this answer help u