Physics (Potential & Kinetic energy)
posted by Anna .
A 2.0 kg rock falls from a height of 25 m to a point 20 m above the ground.
a) how much potential energy does it lose?
b) How much kinetic energy does it gain?
Thanks.

Physics (Potential & Kinetic energy) 
bobpursley
It loses mgh PE
it gains mgh KE
You can calculate those.
You can also calculate the KE from the final velocity .
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