JEE Main Physics question
A body moves a distance of 10 m along a straight line under the action of a 5 N force. If the work done is 25 J, the angle between the force and the direction of motion of the body is
Answer: (B)
Solution
W = Fs cosθ ⟹ cosθ = W/(Fs) = 25/(5×10) = 0.5 ⟹ θ = 60°.