Newton's Laws of Motion
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 will stay in motion unless a force acts against it such as gravity and friction. A object that is at rest will stay at rest unless a force causes it to go into motion.
Example: The person flicks the paper, which was at rest, off the cup and causes it to go into motion.
In Class Demonstration: A ball knocking over a text book.
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).
Acceleration is a change in velocity (speed and direction). It is caused by forces like friction or inertia acting on a mass. One way to put it would be unbalanced force= change in speed= acceleration.
Example: It the first half of the photo the person is not applying a lot a force to the box because it dose not have as much mass but in the second half to person is applying more force because there in more mass
In Class Demonstration: pushing a te
Third Law: Action and Reaction
For every action there is an equal and opposite re-action.
For every actionthere is for an object their will be a
The skater is pushing on the ground to make his skateboard move and the ground is pushing on him.
In Class Demonstration: a ball and a toy car collide and they will both accelerate at different rates.