Question

a man pulls a trolly through a distance of 20 m on a smooth horizontal surface the of the trolley makes an angle of 30° with the horizontal surface. if the force applied by the man is 30N, then calculate the work don in pulling the trolley.​

Answer 1

work done = Fs cos(angle)

let angle be Z

work = Fs cosZ

= 30×20×cos30°

= 600×√3/2

= 300√3

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