Correct Answer to Question 4

The work W done by the boy is

W = F S.

F is the force and F is the component of this force in the direction of the displacement S.

Now, F cos(60) = 2 * 0.5 = 1 N.

Since, S = 5m, the work done is W = 1*5 = 5 joules.

Formula Sheet

Question 4

Question 5

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