A Body Moves A Distance Of 10 M Along A Straight Line Under Action Of 5 N Force

Q. A body moves a distance of 10 m along a straight line under action of 5 N force. If work done is 25 J, then the angle between the force and direction of motion of the body will be

1) 75°

2) 60°

3) 45°

4) 30°

Answer:

2) 60°

Solution:

Distance, S = 10 m

Force, F = 5 N

Work done, W = 25 J

W = F.S cos θ

25 = 5 x 10 cos θ

cos θ = 25/50 = 1/2

θ = 60⁰