Science 26

Two students are investigating kinetic energy (energy of motion.)

Experiment 1

The students laid two identical wooden planks (A and B) against a trunk at varying angles – 45 and 30 degrees – as shown in Figure 1. They released concrete blocks down each plank, and calculated the kinetic energy of the blocks as they slid down the planks.

Experiment 2

The students pushed a cart from the top a hill and allowed it to roll down a series of smaller hills until it came to rest at the end of the course. The students calculated the kinetic energy of the cart at various points on the hill, represented by vertical lines.