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Work, power and energy(2)

Work, power and energy(2). Solutions. Q1. A pole-vaulter has a mass of 50kg. (a) What is her weight in newtons?(g = 10N/kg). W = mg = (50)(10) = 500N. (b) If she vaults to 4 m high, what is her gravitational potential energy?. P.E. = mgh P.E. = (50)(10)(4) = 2000J.

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Work, power and energy(2)