What Is Life? 2nd Edition by Jay Phelan

تمرين 34

A cyclist rides her bike up a very steep hill. Pick from the flowing choices the statement that properly describes this activity in energetic terms.
A) Potential energy in food is converted to kinetic energy as the cyclist's muscles push her up the hill.
B) Kinetic energy is highest when the cyclist is at the crest of the hill.
C) The cyclist produces the most potential energy as she cruises down the hill's steep
D) Potential energy is greatest when the cyclist is at the top of the hill. slope.
E) Both a) and d) are correct.