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Work, Power And Energy
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05/11/2021 4:25 pm
Topic starter
(a) What happens to the work done when the displacement of a body is at right angles to the direction of force acting on it? Explain your answer.
(b) A force of 50N acts on a body and moves it a distance of 4m on a horizontal surface. Calculate the work done if the direction of force is at an angle of 60 degree to the horizontal surface.
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05/11/2021 4:27 pm
(a) When the displacement of a body is at right angle to the direction of force acting on it, then the work done will be zero.
(b) Force, F = 50 N
Distance, s = 4m
Angle between direction of force and direction of motion, θ = 60 degree W
ork done, W = F cos θ s = 100 J