Question #85094

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Question #85094

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Answer 1 · 2018-02-11T20:26:44

$G P E = 2880 J$ $GPE = 2880 J$

Explanation:

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

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

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

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Question #85094

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