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.
