Two rocks of same mass are rolling down a hill at different speeds (one faster than the other). which rock would have more kinetic energy?

Since they are both of the same mass while at the top of the hill both rocks would have 0 kinetic energy and 100 potential energy. Once the first rock starts to roll down the hill once it is at the middle of rolling down the hill then it will have 50 kinetic energy and 50 potential energy. Then when the second rock rolls down then it will have 50/50 and once the first rock hits the bottom it will have 100 kinetic energy and 0 potential energy. So the first rock will reach the bottom first therefore it will have the most kinetic energy sooner.

Hope this helps! :3

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.

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