Posted by EM on .
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,
Hints:
1 watt = 1 joule/s = 1 Nm/s = 1 kgm²/s&su3;
h=10m
weight,w=500N (=mg)
t=40 sec.
power = Nm/s = wh/t watts
1 horsepower = 745.7 watts