Speed
how far you will go in a certain amount of time
Velocity
How to change velocity? Increase or decrease speed, or change directions
Acceleration
If your velocity is changing in any way then you have an acceleration.
Gravity
Earth, g= 9.8 m/s2
Force
push or a pull on an object.
CONTACT FORCES that occur when objects actually are influence each other by touching.
� There are also FORCES that act on objects without the objects coming into contact. (compass, static electricity)
Momentum
object's mass times its velocity.
Linear Momentum
...
Angular Momentum
An object that is spinning/turning or traveling in a circular pattern has angular momentum.
� A special kind of force changes an object's angular momentum--it's called a torque.
(Earth, the planets, Moon, a comet, a rotating neutron star, the Sun)
Conservation of Momentum (Kepler's 2nd Law of Planetary motion.)
Conservation of momentum is a law that hold true throughout the Universe.
-Momentum cannot just "disappear" or "go away" although momentum CAN be transferred from one object to another.
Angular momentum = mass x velocity x radius
Rotating objects conserve
Elevator Ride and Apparent weight
Objects in orbit around earth are essentially in state of free fall. <150 speeding up as the elevator is moving down. Slowing down as elevator moves up. >150 speeding up as you go up. 150 v=constant
Gravitational Fore
g = m1m2/d2