Homework Help: PHYSICS

Posted by EM on Wednesday, February 23, 2011 at 3:09pm.

A person who weigh 500N climbs a flight of straight from the ground to the 4th floor of a building in 40sec. If the height of 4th is 10m find
A... power in watts
b.....power in Hp

PHYSICS - MathMate, Wednesday, February 23, 2011 at 7:27pm
Hints:
1 watt = 1 joule/s = 1 N-m/s = 1 kg-m²/s&su3;

h=10m
weight,w=500N (=mg)
t=40 sec.
power = Nm/s = wh/t watts

1 horsepower = 745.7 watts

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