Posted by **Igbekele** on Sunday, February 26, 2012 at 1:41am.

A boy whose mass is 40kg runs up a flight of 30 steps each 150mm high in 6seconds. Find the average power developed (take g as 10m/s^2.

- Physics -
**Damon**, Sunday, February 26, 2012 at 3:46am
work done = m g h = 40 * 9.81 * 30 * 0.150 Joules

power in Watts = work done / 6 seconds

- Physics -
**EKEZIE MICHAEL NWOKEUKWU**, Friday, January 15, 2016 at 3:12pm
g=a=10m/s^2,

M=40kg,

S=150mm/1000=0.15m*30steps each=4.5m,

F=ma=40*10=400N

.'. Power=W/t=F*s/t=F*V=1800/6 = 300W Ans// or 0.3kW Ans//

## Answer This Question

## Related Questions

- Physics - A boy whose mass is 40kg runs up a flight of 30 steps each 150mm high ...
- Physics - A boy whose mass is 40kg runs up a flight of 30 steps each.150mm,in ...
- science - a boy whose mass is 69kg climbs a tree 10m high in 12s .calculate the ...
- PHYSICS: - A boy weighing 350N runs up a flight of stairs consisting of 20 steps...
- physics - a boy weighing 350N runs up a flight of stairs consisting of 20 steps ...
- physics - A man whose mass is 75kg walks up a flight of 12 steps each 20 cm high...
- Physics - Please help me with this question How much work is done by a boy of ...
- physics - A 680 newton student runs up a flight of stairs 3.5 m high in 11.4 ...
- physics - a boy who can generate 500 w runs up a flight of stairs in 5.0 s.how ...
- energy - A boy weighing 350Newton runs up a flight of stairs consisting of 20 ...

More Related Questions