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20 Cards in this Set

  • Front
  • Back
  • 3rd side (hint)
What is one's Frame of Reference
The background or point (assumed to be stationary) used for comparison when motion is described
What's your point?
a change in position in a certain amount of time.
The four steps to problem solving
1.) Write the formula
2.) Plug in the numbers
3.) Show the math
4.) Display the answer (circle it!)
The rate at which an object moves.

Speed = Distance / Time
s = d/t
Speed in a given direction.
The rate of change in velocity

Acceleration = (Final Vel. - Initial Vel.) / time
A = (v[f] - v[0])/t
depends upon the mass of the object and the velocity with which it is traveling

Momentum = mass × velocity
a push or a pull. Gives energy to an object, sometimes casuing it to start moving or change direction.
Combining Forces: Unbalanced Forces
- change the motion of an object
- if standing still, then start moving | + → = →
- if moving, then slow down/stop, or speed up → + → = →→
Combining Forces: Balanced Forces
No change in motion

→ + ← = |
A force that opposes motion.
- exists when two surfaces touch
- exists because objects and their surfaces are not perfectly smooth.
- Causes moving objects to slow down.
Three types of friction
Amount of friction depends upon
How hard the objects are pushed together by
- the mass of the objects.
- gravitational and other forces
- surface materials
- type of friction produced
The amount of matter in an object.
Newton's first law of motion
An object will resist changes in motion.
Newton's Second Law
For a given force:

F = Mass * Acceleration

For a given mass:
- The larger the mass, the smaller the acceleration,
- The smaller the the mass, the larger the acceleration
Newton's Third Law
For every action, there is an equal and opposite reaction
Action Force
The initial (starting) push or pull
Reaction Force
That force that pushes or pulls back in response to the action force
The pull of gravity on an object.