a) What happens to the work done when the displacement of a body is at

1.	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.
Answer» 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 = 50N Distance, s = 4m Angle between direction of force and direction of motion, θ = 60 degree Work done, W = F cos θ s = 100 J

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.

Answer»

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 = 50N

Distance, s = 4m

Angle between direction of force and direction of motion, θ = 60 degree

Work done, W = F cos θ s = 100 J

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