NEWTON'S LAWS OF MOTIONS

• Jacob Stiles
• 7th Period
• 9/22/14

Newton's first law: An object in motion will stay in motion, and object at rest will stay at rest until an external force acts upon it

A car shows Newton's first law because of the friction on the road. Because there is friction, the wheels are the car can work with friction to stop. Without Newton's first law the car would not be able to stop, then you would crash. When the car does stop, it will stay stopped until something moves it. Because if Newton's first law you need gas in order to start a car.

If the girl weren't there, the chair could stay at rest. Because an external force acted on the chair, it changed states. Now the chair would continue to move if there were no friction from the sand. The chair will continue to move until the girl stops. The moment she stops, the chair will be back in the state of rest.

Newton's second law:
Force=Mass*Acceleration

The amount he can lift depends on the force he is able to put into lifting it. The less his mass, the less weight he can lift. If he does his repetition with more acceleration, he will be able to get more weight. If someone has more mass than him, they will be able to lift more than him. His lifting capability relies more on mass rather than strength.

Because force depends on mass and acceleration, the red sumo takes down the blue sumo. This is why it's hard to push someone bigger than you. If the red sumo were smaller than the blue sumo, he would rely on his acceleration. Luckily for the red sumo he is bigger, and doesn't have to accelerate as much. If he were to have neither acceleration or size, Newton's third law would come in action, and he would just fall back.

Newton's third law: For every action there is an equal and opposite reaction

The force at which the kid hits the trampoline decides the force at which it throws him up. If the kid were to lightly bounce, he would get little force from the trampoline. Because the kid is putting a lot of force into the trampoline, it returns him with enough force for him to get a backflip.

A bouncy ball works like a trampoline. If you drop the ball, it will get little height. The closer you are to the ground, the less height you will get. A six foot tall man throwing the ball at the ground with all his force will make the ball go higher than a little boy doing it. In this picture the two balls at the top were dropped from higher than the ones below.