A force that two surfaces exert on each other when they rub on each other.
100
What does Newton's 1st Law of Inertia state?
An object that rest will stay at rest and a object in motion will stay in motion at the same speed and direction (velocity) unless acted upon by and outside force.
200
Power is the exertion of_______in order to do work
force
200
what is force
a push or pull
200
what does the D and T stand for in D/T?
Distance & Time
200
what are the 4 main types of friction?
Static, sliding rolling and fluid friction.
200
For every ___ there is an equal and opposite ___.
action;reaction
300
A blue skier weighs 300 pounds, and a yellow skier weighs 100 pounds. They both are at a height 500 feet, witch color will finish at the bottom first?
blue skier
300
why do we stay on the ground?
gravity forces us down while the force of the ground pushes us up
300
what is instantaneous speed?
the rate at which an object is moving at a given instant in time
300
If the force of friction is going up, in which direction would motion be going?
down
300
What does the N in 100N equal?
F= ma
400
What is the formula for kinetic energy
1/2 x MASS x SPEED x SPEED
400
what is the weight of the moon in newtons?
270N
400
What is the difference between speed and velocity?
speed rate at which an object is thrown & velocity is speed and direction of which something is thrown
400
what determines the strength of friction?
The type of surface and how hard the two surfaces are pushing together
400
If a ball is rolled on a smooth surface, and then transfers a rocky surface. Will it slow down or stop completely?
It will slow down
500
What does the law of conservation of energy state?
when one form of energy is transformed to another no energy is destroyed in the process.
500
One ball is dropped vertically and a second ball is thrown horizontally, which will hit the ground first?