What You have done?
You are applying a force of 10 N on an object due to which it displaces 5 m in the direction of force and the work is w1 here. Second time you displace it with same force and same displacement takes place but the angle between the force and displacement this time is 60 degree and the work this time is w2. Find w1 - w2 (Write your answer without any unit)
The answer is 25.
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1 solution
W = Fs cos θ .
F = 10 N.
s = 5m.
Case 1.
θ = 0 degrees.
Thus, cos θ = 1.
Thus, w1 = 5 x 10 x 1 = 50 Nm.
Case 2.
θ = 60 degrees.
Thus, cos θ = 0.5.
Thus, w2 = 5 x 10 x 0.5 = 25 Nm.
Thus, w1 - w2 = 2 5 Nm.