Question #85094

Feb 11, 2018

$G P E = 2880 J$

Explanation:

His increase in altitude was
$45 \text{cancel(steps)"*(0.16 m)/"cancel(step)} = 7.2 m$

His increase in gravitational potential energy was
$G P E = m \cdot g \cdot h = 40 k g \cdot 10 \frac{m}{s} / s \cdot 7.2 m = 2880 J$

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