When ocean waves hit the beach, kinetic energy is stopped by the sand and rocks on the beach. the energy is then lost from the ocean. how does this example show the law of conservation of energy?

The answer is energy is transformed to vibrational energy in the sand, rocks, and air, cold water from the poles sinks, leaving behind higher salinity water. The beach is an isolated system, so energy is allowed to exit the system not the energy from the water is destroyed.

he is very short, and he can only reach halfway up on the elevator buttons. but on a rainy day, he has his umbrella with him, and he uses it to poke the button at the top.

the answer to your question is slate