The best way to use textbooks: to build ramps

In the experiment, the students roll a marble down the ramp and vary the height of the ramp. The marble will go faster the higher it starts (more kinetic energy coming from more potential energy) but, in a low resources classroom, we don’t have a way to measure the speed of the ball. Fortunately, the faster the ball is going (higher ramp) the farther the ball will push the cup when the ball hits the cup at the end of the ramp. We can use the distance that the cup moves as a substitute for the speed.

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