Question

Ellen was training for a bike race. One afternoon, she grabbed her helmet and took her bike out to the street. She got on the bike and started to pedal, pushing hard to start moving forward. Which of the following is better evidence that Ellen’s kinetic energy changed? A. When Ellen got on her bike, her feet were no longer touching the ground. Or B. When Ellen started pedaling her bike, she began moving along the street

Answer 1

B. When Ellen started pedaling her bike, she began moving along the street

Step-by-step explanation:

Kinetic energy is energy of motion. Ellen's kinetic energy changed when she went from rest to being in motion (began moving).