Mary used a bat to swing at a baseball that was moving toward her. She hit the baseball and it traveled in the opposite direction, right out of the park!
Vocabulary words to use (2 per sentence at least):
Force, motion, velocity, cause, effect
Question you're answering: What happened when Mary swung her bat and hit the baseball?
1) I think the velocity of the ball changed because...
2) The caused the ball to ...