Question

(i) What happens to the work done when the displacement of a body is at right angle to the direction of force acting on it? Explain your answer.
​(ii) A force of 50 N acts on a body and moves it a distance of 4 m on a horizontal surface. Calculate the work done if the direction of force is at an angle of 60° to the horizontal surface.

Answer 1

Answer:

Work done on an object along a given direction of motion is equal to the force times the displacement times the cosine of the angle. No work is done along a direction of motion if the force is perpendicular.