In this activity, students use a marble, golf ball, and tennis ball to determine if heavier objects fall faster than lighter objects.
First, students find the mass of each ball. Next, students hold the ball at the top of the meter stick and time how long it takes the ball to hit the ground. After testing all three balls multiple times, students will conclude that all of the balls fall at the same rate because they all have the same gravity. As an extension, students explain why this experiment does not work with a feather and a tennis ball.