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26-02-2016
Physics

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An electric motor has a rating of 4.0 x 10^2 watts. How much time will it take for this motor to lift a 50.-kilogram mass a vertical distance of 8.0 meters?

Respuesta :

Willchemistry Willchemistry

26-02-2016

ΔT = ?

P = 50 kg

ΔS = 8.0 m

g = 9.8 m/s²

Pot = 4,0x10² W

Find the time :

ΔT = P * g * ΔS / Pot

ΔT = 50 * 9.8 * 8.0 / 4.0x10²

ΔT = 3920 / 4x10²

ΔT = 9.8 S

hope this helps!

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