A force of 30 N acts on a body and moves it through a distance of 5m in the direction of force. Calculate the work done by the force.
Answer:F = 30 Nd= 5mWork done = w = F × dW = 30 × 5= 150 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 50 N acts on a body and moves it a distance of 4 m on a horzontal surface. Calculate the work done if the direction of force is at an angle of 60∘ to the horizontal surface.
A body is moved in a direction opposite to the direction of force acting on it. State whether the work is done by the force or work is done against the force.