# A boy weighing 40

Given,

Mass of the boy, m = 40kg

Height gained by it, h = 1.5m

(i) K.E = 0 at highest point because velocity of the high jumper at the highest point will be 0

(ii) Potential Energy, P.E = mgh

= 40 × 10 × 1.5

= 600 J

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