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# The Physics of Jumping on a Trampoline

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## Anitra Hilliard

on 7 January 2013

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#### Transcript of The Physics of Jumping on a Trampoline

By: Anitra Hilliard
3rd period
Brax The Physics of Jumping on a Trampoline FUN!!!!!!!! Jumping on a trampoline is an activity that is loved
by people of all ages. The physics of a person jumping on a trampoline is
quite simple. There are only 3 forces acting upon the
object. Free Body Diagram This is a free body diagram of a person jumping on
a trampoline. The dot in the center represents the
person Spring Force The spring force is the force that the mat acts onto
the person who is jumping. Spring Force cont. The mat acts as a spring force because of the
springs that are carrying the mat. This is because
the force is upwards. The spring pushes the person
up until the natural acceleration of gravity slows the person down, causing the person to fall back to the trampoline. Applied Force The applied force contributes to a higher jump. This happens the moment the person extends his legs while jumping on the mat. Gravitational Force The gravitational force pulls the person back to the trampoline after jumping. Without gravitational force, the person would be pushed off the trampoline and would continue at the same velocity upwards into space. Gravity Gravity is the only force acting upon the person as he is jumping. If another force was acting in the opposite direction of gravity, upwards, then he would continue to go up. Newton's 1st Law If the person is standing immobile on the trampoline, he's at rest. If he pushes his feet down while upon the trampoline, he's creating the applied force or unbalanced force. Newton's 3rd Law When the person bounces down back to the trampoline, and the surface of the trampoline reacts by pushing the same force upwards onto his feet.
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