Question

Squal goes up to his ceiling using a 10 m rope suspended from the top. If he is 55 kg in mass and it takes him 3.2 seconds to reach the ceiling. How much power is he exerting in climbing? (approximate g at 10 m/s2)

Answer 1

Question 30624

Squal goes without acceleration hence according to $2^{\mathrm{nd}}$ Newton's law force of gravitation is equal by absolute value to the force that equal exerts ($F = m g$).

Power is calculated as $P = \frac{A}{t} = \frac{F \cdot s}{t} = \frac{m g s}{t}$, where $A$ denotes work done by moving $s$ meters exerting force $F$.

Plugging values and calculating, obtain from the latter formula $P = 1718.75W$.