- #1
kudoushinichi88
- 129
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Homework Statement
Homework Equations
Conservation of Energy
The Attempt at a Solution
The girl has potential energy of 400(1.2) J at A. At B, her total energy is 400(0.6) J plus her kinetic energy.
But at this point, she's also doing work against gravity, which is 400(0.6) J.
So is it correct for me to say that this takes away her kinetic energy, therefore giving her a zero velocity at B and h=0.6m?
Or is this only true if she gradually stands up?
In the case of her instantaneously standing up, does this means the work done against gravity by the girl adds energy into the system, therefore increasing the Ek of the girl?