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FORCE AND MOTION
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Gravity
Key Concepts:
Terms in this set (23)
A push or pull is called?
force
Change in velocity with increase of speed would show
acceleration
Speed is figured by...
Distance divided by time.
What is speed? 50 miles in 2 hours?
25 mph
Ball won't move until you kick it!! What law?
Newton's First Law
The impact or force of an object depends on its acceleration and the mass of it!! What law?
Newton's Second Law
The larger the mass, the more
force is needed to push or pull it.
How did the speed bumps slow down the cars? They created.....F____________
friction
If you want something to have a greater acceleration, usually the easiest thing to do is to decrease the ________ or increase the ________
mass....force
Two cars traveling down roads, and Car A is slower. Car A's road probably has a road with more or less friction?
Car A which is slower has most friction, slowing car down.
What force pulls objects down to earth-ATTRACTS?
gravity
The larger the mass the stronger the pull of
pull of gravity.
Newton's third law? For every action, there is an equal....
and opposite reaction.
Point A is at top of inclined plane and B at the bottom of hill. Which will show greatest speed when moving and greatest kinetic energy?
Point at bottom, top speed.
John ran a 10 mile race in 2 hours. What was his average speed? Use the formula.
5 miles per hour. Distance divided by time.
Point A at top of hill, and Point B at bottom of hill. Neither are moving. Which points shows least kinetic energy?
Point A as it has potential
Car stops, you go forward. This shows __________.
inertia or Newton's first law
A ball on top of a hill or a ball speeding down a hill....which would show the most kinetic energy?
Ball speeding down a hill.
When your parent stops really fast in the car, you go forward. What law does this illustrate?
Newton's first law which is inertia.
Newton's Second Law is illustrated when it takes more force to move an object with less or more mass?
It takes more force to move an object with more mass
The amount of matter of something is its
mass
A straight line across on a graph of motion means fast speed or not moving?
not moving
A steep line on a motion graph means
acceleration
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