A 100 kg man climbs the stairs at a football stadium 50 m tall in 45 s. What was the man's required power output?

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1111.11 W

Explanation:

Power is the rate of doing work with respect to time, its S.I unit is in watts but it can also be expressed in J/s. Power is calculated using the formula:

Power is also the rate at which energy is used per second.

Given that mass (m) = 100 kg, height (h) = 50 m, acceleration due to gravity (g) = 10 m/s and time = 45 s.

The man climb the stairs and experiences a potential energy, hence:

potential energy = mgh = 100 * 10 *50 = 50000 J,

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