The+Review+For+You

**Speed and Acceleration**

 * Speed is how fast an object is moving
 * Acceleration is the change in velocity over a period of time
 * Speed: S=d/t
 * Acceleration: a= Vf -Vi/ t
 * Speed is a "scalar" quantity which means that it is fully described with just a numerical value of magnitude

**Velocity**

 * The speed and direction an object is moving
 * Vector quantity's need to have both magnitude and direction
 * V=d/t
 * V=m/sec2

Momentum **and Impulse**

 * momentum(p)- inertia in motion
 * mass x velocity
 * measured in kg x m/s
 * The symbol for the quantity momentum is the lower case "p".
 * p=m * v
 * Momentum can be defined as "mass in motion"
 * Momentum is a vector quantity which is a quantity that is fully described by both magnitude and direction
 * The direction of the velocity vector is the same direction that an object is moving

Newton and Gravity

 * gravity is a constant force exerted by objects that have mass
 * weight is the pull of gravity
 * Newton explained the workings of the universe through mathematics
 * Th force equation for two particles interacting through gravity F8 = G m1 m2 / r2
 * Newton's law of gravity defines the attractive force between all objects that possess mass