Like this study set? Create a free account to save it.

Sign up for an account

Already have a Quizlet account? .

Create an account


the direction and the distance between the final position and the starting position


the distance traveled divided by the time needed to travel that distance ( s = d/t )


the speed in a particular direction


a change in velocity divided by the amount of time over which the change occurs ( a = F/m )


a push or a pull ( F = ma )


measures an object's tendency to resist a change in motion

balanced forces

forces that cancel eachother out ( they do not cause a change in motion )

unbalanced forces

forces that are not balanced; they do cause a change in motion ( the object will move in the direction of the stronger force )


resists motion between two touching surfaces


a pull that all matter exerts on other matter

centrifugal force

causes the object to move away from the center

centripetal force

causes the object to move in a circular path towards the center

Newton's First Law of Motion

an object at rest tends to stay at rest, an an object in motion keeps moving in a straight line at constant speed until an outside force ( or unbalanced force ) stops it

Newton's Second Law of Motion

acceleration depends on the mass of an object and the force pushing or pulling the object

Newton's Third Law of Motion

for every action, there is an equal and opposite reaction that happens at the same time

Newton's First Law of Motion example

If a ball is not moving, it will stay that way until some force makes make it move.

Newton's Second Law of Motion example

If two bike riders pedal with the same force, the rider moving less mass accelerates fatser.

Newton's Third Law of Motion example

A girl jumps on a trampoline. The action is the girl pushing down on the trampoline. The reaction is the trampoline pushing up on her.

balanced force example

A boy is pushing up against a cement wall. No matter how hard he tries, the wall will not move.

unbalanced force example

A towtruck towes a car after a wreck. As a result, the car is moving in the direction of the towtruck.

centrifugal force example

A person rides the merry-go-round.

centripetal force example

The moon orbits Earth.

velocity example

A car is traveling 30 mph/south.

speed example

The long distance jogger's time was 6 mph for the race.

acceleration example

A softball is hit into the outfield.

acceleration formula

a= F/m or fV - iV/t

force formula

F = ma

mass formula

m= F/a

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions and try again


Reload the page to try again!


Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

Voice Recording