NancyT303
contestada

How many students would it take to move 10 teachers, together exerting a force of 50 000N, once around a 400m track. Each students contributes 2000kJ of work.

Respuesta :

work done = force * distance that is move in direction of force

workdone = 50000N * 400m
= 2 * 10^7 J
since each student contributes 200kJ of work

no. of students = 2 * 10^7 J / 2000 * 10^3 J
= 10

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