Newton's first law: inertia
-An object at rest will remain at rest unless acted on by an unbalanced force. An object in motion continues in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
-an object in motion keeps moving until a force stops it and a still object will stay still until a force moves it.
-this picture means... this picture shows an empty bottle sitting on the ground at a train station. when the train jets off the bottle moves in the opposite way of the train. then when it stops the bottle moves back.
-demo: if i through a dry erase marker hardly in the trash can, it will cause the trashcan to rock/ or move
-how? well when i through the marker there is a strong force behind it which makes the object at rest move.
Newton's second law: acceleration
-Acceleration is produced when a force acts on a mass. The greater the mass (of the object being accelerated) the greater the amount of force needed (to accelerate the object).
-when a mass that is bigger adds a force to a mass smaller it causes a force that that accelerates an object.
-this picture shows... a small mass pushing a heavy mass. the car isnt moving because of how heavy it is.
-demo: throwing a crayon compared to a weight
-how? throwing a heavy weight is harder and has more mass than a small crayon. when you throw the crayon it goes further than throwing a huge, heavy weight.
Newton's third law
-For every action there is an equal and opposite re-action.
- when you push an object and it reacts back
-this picture means...two people are running into each other then separate, when they separate they go back as far back as how hard they hit each other before
-demo: two bouncy balls rolling and hitting each other. the balls bounce off of each other and they both change direction
-how? the two forces are equal which means the force they give will cause them to react in the opposite direction.