The third graders have been learning about force and motion in various ways. Today we performed 2 different experiments around force and motion. The first was with a small catapult. We launched a pom-pom off a catapult, two trials having the catapult halfway down and two trials having the catapult all the way down. We measured how far the catapult launched the pom-pom each time. The second experiment was with a pulley and a scale. We used a pulley system to fill a jar with marbles and weigh different amounts of marbles inside the jar. We observed the pulley and noticed the changes as we added more marbles.