Notes+on+Newton's+Laws


 * Summary of Newton's Laws**
 * 1) An object at rest will stay at rest and an object that is in motion will stay in motion unless a non-zero force acts on it.
 * 2) The acceleration of an object is directly proportional to the net force that acts on it. Net-force = Acceleration x Mass.
 * 3) For every action, there is an equal and opposite reaction.

When a human throws a ball, the ball will be impacted by force other than gravity when the ball is sill in contact with the hand. Once the ball is released, gravity would be the dominant force that is pulling the ball towards the ground, this will accelerate the ball downwards, but the affect of gravity pushing down can be seen once the ball reaches the 0 velocity mark and turns around. When it's at 0 velocity, the ball is still accelerating, it's like the speed of the ball at a certain time.

Gravity on Earth will always impact an object no matter where it is, if it looks like it's not moving, then there is an opposite force acting on it.

The regular acceleration for an object that is dropped without any additional force is 10 meters per second squared.

Acceleration consists of two things, change in speed and time interval.

Inertia is also known as Newton's first law.

If an object is not accelerating, then the net force is 0.

It is not safe to assume that an object that is not in motion has a zero net force, take a ball in mid air for example (right before it turns around).

All objects will have forces acting on it.

Terminal velocity is where an object or person is no longer accelerating while it's still moving. An example of this would be a skydiver at a terminal velocity of 150 kilometers per hour.