Energy and its Conservation

Energy and its Conservation problem 53

Determine whether the change in energy of each body described in the list below is affected by work or heat. Use the energy balance as a guide.

  • A body falls freely at a uniform speed.

  • We take an elevator 2 floors up.

  • An athlete throws a javelin 80 m away.

  • A cyclist presses the pedals and rides uniformly up a slope.

  • A car accelerates while overtaking.

  • Mom heats the food for lunch.

  • The sun heats the water in the pool.

  • A teapot cools slowly.


material editor: Gabriel Amakhabi