Show:
Force
Friction
Newton's Laws
Momentum and Gravity
Misc
100
What is the unit of force
newtons (N)
100
Define friction
force that opposes motion
100
Newtons third law says forces always occur in _____
pairs
100
If an object is not moving its momentum is
zero
100
If an object is moved from the earth to the mean, will its mass change?
no, the mass remains the same, the weight will change
200
Forces are vector quantities, meaning they need ______
direction
200
If two surfaces are not moving past eachother, _____ friction is present
static
200
You push on a wall with a force of 5 N, with how much force does the wall push on you?
5 N
200
Gravity is a _____ force, meaning it acts over a distance
field
200
When an object is in circular motion, the net force acting on it is called the _______ force
centripetal
300
If the mass of an object increases, the force required to cause the object to accelerate will ________
increase
300
THis type of friction is the usually the smallest of the three types
Rolling
300
If an objects acceleration increases, its force will increase, this is a _______ relationship
direct
300
The maximum speed an object will reach when in freefall is _____
terminal veloicity
300
AN object that flies through the air is refered to as a ___
projectile
400
The combination of all the forces acting on an object is call the _______ Force
Net
400
The Normal force is the upward force applied by the surface on an object. If the normal force increases, what happens to the friction force?
increases
400
Newton's Third Law states that for every action force, there is an equal but opposite reaction force. These forces come from ______ object(s)
different
400
Which has a greater affect on the force of gravity, the mass or the distance between the masses
distance
400
Which will have more momentum a bowling ball moving at 50 mph, or a baseball moving at 50 mph
bowling ball, mass and momentum are directly proportional. Mass and velocity are inversely proportional
500
What are two possibilities for net force to equal zero
object traveling at a constant velocity or if it is not moving.
500
This type of friction occurs when two surfaces, slide past eachother
sliding
500
Newtons 2nd Law states that Force is dependant on ______ and ______
mass and acceleration
500
Weight is equal to ______
force of gravity
500
THe path of a projectile is shaped like a _____. (think of gaphs in math)
parabolic curve