DillonWatkins651 DillonWatkins651

02-03-2021
Physics

contestada

Tom has a mass of 50,000 g and runs up a flight of stairs 4 m high in 12.5 seconds.
Calculate Tom’s power. (g = 10 m/s2)

Respuesta :

jcherry99 jcherry99

02-03-2021

Answer:

160 watts.

Explanation:

Remark

Power = Work / Time

Work = F * d

Note: Since he is running up stairs he is doing work against gravity.

Givens

m = 50000 g kg / 1000 grms
m = 50000 / 1000 = 50 kg
h = 4 m
time = 12.5 seconds
g = 10 m/s^2

Formula

P = W * d/t
W = m*g *d / t

Solution

P = 50kg * 10 m/s^2 * 4 m / 12.5
P = 160 watts.

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