Contact forces
Applied force
The force which an object or person applies force to something else
Speed
Distance divided by time
Distance
Speed times time
Friction
The opposing force released by one surface onto another
Force
Mass times acceleration
Time
Distance divided by speed
Tension
The force when something is puled tight by forces working against eachother
Gravitational potential energy
Mass times gravity times height
If a skateboard is traveling at 20 m/s, and is going at 5 miles an hour, what is the acceleration of the skateboard?
4 m/s2
Normal force
The support force applied to an object.
Total mechanical energy (TME)
Potential energy +kinetic energy
Air resistance
A special type of frictional force
Kinetic energy
0.5 times mass times velocity