Answer to Question #317270 in Physics for Sunday

Question #317270

A ball of mass 8kg falls from a height of 100m . Neglecting air resistance, calculate its total energy after falling a distance of 40m

Expert's answer

The total energy of a ball

"E=E_k+E_p=const"

"E=E_{k1}+E_{p1}=0+mgh_1\\\\\n=8*9.8*100=7840\\:\\rm J"

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