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This activity has students jump with and without weights. Their data should reveal that gravity has more of a pulling force with heavy objects that are on the ground than light objects on the ground.
A force is required to overcome gravity. When a person jumps, he applies a force that is able to briefly overcome the pull of gravity. The more weight a person has, the more force is required to lift him. If you are carrying a weight, you need more force to jump. In this activity, students will see how high they can jump without extra weight and with extra weight.
Pre-Assessment/Invitation to Learn
Ask students how high they can jump. Show them the meter sticks and have them guess. Then ask them how holding a weight will affect the height of their jump. Tell them they are going to find out the answers to these questions next.
Jumps with weights: