Kinetic Energy and Potential Energy question:
http://d.pr/i/vcK4
The gymnast descends from position B and regains contact with the trampoline when it
is in its unstretched position. At this position, her centre of mass is 3.2 m below its
position at B.
Calculate her kinetic energy at the instant she touches the unstretched trampoline

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mass*4.2*9.8
I think

mass is 55

nope. That's PE of when the person is at B.

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