An 77-kg hiker climbs to the summit of Mount Mitchell in western North Carolina. During one 2.0-h period?

An 77-kg hiker climbs to the summit of Mount Mitchell in western North Carolina. During one 2.0-h period, the climber's vertical elevation increases 540 m.

Determine the change in gravitational potential energy of the climber-Earth system.

Determine the power of the process needed to increase the gravitational energy.

2 Answers

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  • 5 years ago
    Favorite Answer

    It's "a" 77 kg....!

    Climb time = (2h x 3600s) = 7200 secs.

    Height gain = 540 metres.

    Work done = (mgh) = (77 x 9.8 x 540) = 407,484 Joules of GPE gained.

    The power = (407,484/7,200 secs) = 56.595 Watts.

  • olia
    Lv 4
    3 years ago

    Mount Mitchell Elevation

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