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Initial velocity=0
Final velocity= 1.219 m/s/s
Momentum=  .5653 kg m/s
KE=  .3445 J
Acceleration= .2902 m/s/s
Impulse= 2.374 N
Deceleration= .04423 m/s/s
Force of Friction= .1345 N

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Energy is stored in the spring to start. (PE)

As it starts to release, the energy travels down the string and into the axel. (KE)

The car starts to move, the mousetrap spring loses energy and the wheels start to roll. (KE)

The friction between the wheels and the ground slows the car down. (turns into heat -- KE)

The car loses energy and comes to a stop. (PE)

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When forces are applied through time to an object, the object changes momentum and causes a change in velocity.

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Definition:
Mass in Motion (How much of something is moving and at what rate)

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When we set the mousetrap car, the energy being stored (not used) is Potential Energy. And once we release the back axel, the car uses Kinetic Energy to propel the mousetrap shut.

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Definition: Force through time

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Action= Axel pulls string
Reaction= String pulls axel

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Action= String pulls lever
Reaction= Lever pulls string

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Action= Car pushes earth
Reaction= Earth pushes car

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Action= Lever pulls mousetrap
Reaction= Mousetrap pulls lever

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When we wind up the string, it's being pulled by the axel. But when we release the string, the string is pulling the axel which causes movement.

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This correlates with the mousetrap car because the smaller the mass of the car, the further it will go because it will have the same force acting on it but it will be further propelled.

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Since the mousetrap car is at rest, it needs an unbalanced force to cause it to move. When we wind up & release the string from springs in the two mousetraps onto the back axel, it pulls the car forward. And without friction, the car would continue moving for eternity.

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HOW DO NEWTON'S 3 LAWS RELATE TO OUR MOUSETRAP CAR?

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HOW DO NEWTON'S 3 LAWS RELATE TO OUR MOUSETRAP CAR?

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Newton's third law states----For every action, there is an equal and opposite reaction

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Netwon's second law states---- The rate of change of momentum of a body, is directly proportional to the force applied and this change in momentum takes place in the direction of the applied force.

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Newton's first law states---- An object motion will remain in motion until acted upon by an outside force and an object at rest will remain at rest until acted upon by an outside force.