which is the best example of the law of conservation of energy?\no a basketball stops bouncing because its…

which is the best example of the law of conservation of energy?\no a basketball stops bouncing because its energy disappears.\no a rolling skateboard slows down because some of its kinetic energy changes to heat.\no a falling book hits the ground and all of its energy is destroyed.\no a toy car gains speed as it moves down a ramp because the ramp creates energy.

which is the best example of the law of conservation of energy?\no a basketball stops bouncing because its energy disappears.\no a rolling skateboard slows down because some of its kinetic energy changes to heat.\no a falling book hits the ground and all of its energy is destroyed.\no a toy car gains speed as it moves down a ramp because the ramp creates energy.

Answer

Brief Explanations:

The law of conservation of energy states that energy cannot be created or destroyed, only transformed.

  • In the first option, saying energy "disappears" violates the law.
  • In the second option, kinetic energy of the skateboard is transformed into heat (due to friction), which is in line with the law.
  • In the third option, claiming energy is "destroyed" is wrong.
  • In the fourth option, saying the ramp "creates energy" is incorrect.

Answer:

A rolling skateboard slows down because some of its kinetic energy changes to heat.