Which best describes Alana's error?
Alana summarized what happens when a ball sitting on top
of a grassy hill rolls down the hill.
The motionless ball has potential energy. Once the ball
starts to roll down the hill, new kinetic energy is made. As
the ball rolls across the grass, it slows down. The kinetic
energy of the ball is converted to other forms of energy.
The motionless ball does not have energy because it is
still.
Kinetic energy is not made; it is a result of energy
transformation
The ball cannot slow down unless someone touches it.
The energy is not converted; it disappears.