Question

work energy power chapter

Answer 1

Work done = Fx = Area under line formed in F-x graph

Work done
From x = 0 to 1
W1 = 0.5 × 1 × 10 = 5 J

From x = 1 to 2
W2 = 1 × 10 = 10 J

From x = 2 to 3
W3 = 0.5 × 1 × 10 = 5 J

From x = 3 to 4
W4 = 0.5 × 1 × (-10) = - 5 J

From x = 4 to 5
W5 = 1 × -10 = -10 J

Total work done = W1 + W2 + W3 + W4 + W5
= 5 + 10 + 5 + (-5) + (-10)
= 5 J

(d) is the correct option.