Question

Question #85094

Answer 1

`GPE = 2880 J`

Explanation:

His increase in altitude was
`45 "cancel(steps)"*(0.16 m)/"cancel(step)" = 7.2 m`

His increase in gravitational potential energy was
`GPE = m*g*h = 40 kg*10 m/s/s*7.2 m = 2880 J`

Notes:

The units of g should be m/s^2 or m/s/s.

I do not know know what the 5.25 number is all about. Units?

I hope this helps,
Steve