Question #85094

1 Answer
Feb 11, 2018

Answer:

#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