Answer: No endorphins
Explanation: cuz' she injured her ankle
Answer:
true
Explanation:
Friction occurs because no surface is perfectly smooth. Rougher surfaces have more friction between them. Heavier objects also have more friction because they press together with greater force. Friction produces heat because it causes the molecules on rubbing surfaces to move faster and have more energy.
Answer:
B
Explanation:
That's the answer. Hope it helped!
Potential energy is highest at the top of the loop, and kinetic energy is highest at the bottom of the loop.