The famous scientist Galileo Galilei did several experiments with sloping planes, which he rolled metal balls down so that he co
uld study motion. By changing the slope, he could study how the speed at which the ball rolled was affected. What was one thing Galileo would have needed to control himself to make sure his experiment gave him useful information?
A. the speed of the ball
B. the slope of the plane
C. the pull of Earth's gravity
D. the material the ball was made of
Changing the slope of the plane would show how fast the ball went when Galileo changed the steepness of the slope. If he didn’t change the slopes steepness he would have the same results each time.
The difference in the maximum energy stored is can be determined by finding the difference in the maximum stored energy in the sprinters and that of the non-athlete:
