Question

A metal ball of mass 60g falls on a concrete floor from a vertical height of 2.8m and rebounds to a height of 1.3m. Find the change in kinetic energy in SI units.

Answer 1

since we know the weight and height, we can find the change in kinetic energy

for this case kinetic energy= potential energy

----> mgh

KE= mgh

= 60x (2.8-1.3) x9.8

=588x1.5

=882

therefore, the answer is 882

hope that helped

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