Friction Forces
Newton's 1st
Newton's 2nd
Newton's 3rd
Which One?
100
______________ is the force that opposes motion between any surfaces that are in contact.
Friction
100
An object at rest stays at rest unless acted on an unbalanced force. (inertia)
Newtons 1st law of motion
100
According to __________, the acceleration of an object is equal to the net force acting on the object divided by the object's mass.
Newton's Second Law
100
Newton's _____ Law of motion states that every action has an equal and opposite reaction.
3rd
100
Newton's 1st
200
Friction acts in a direction ______________ to the direction of the object's motion.
opposite
200
What Unit do we Measure Force in?
Newtons
200
What unit is Force measured in?
Newtons
200
According to Newton's 3rd Law of Motion, for every ____________ there is an equal and opposite ___________________.
action / reaction
200
Newton's 3rd Law
300
A _____________ object generates more _________ force than a ____________ object.
heavier / friction / lighter
300
An object at rest will remain at rest unless it is acted upon by unbalanced _____________.
forces
300
What is the mathematical formula for the 2nd law of motion?
F = ma
300
A book pushes down on a table with a force of 5N, the table... (what is the table doing to the book?)
Pushes back with a force of 5N
300
Newton's 3rd Law
400
The four types of friction are:
static sliding rolling fluid
400
The tendency of an object to resist a change in its motion
Inertia
400
According to Newton's second law of motion, if a rigid body of unchanging mass is observed accelerating, what must be happening?
A force is being applied to the mass.
400
According to Newton’s Third Law, if someone jumps off a skateboard, the skateboard will roll backward because...
for the force that sent the person forward, there is an equal force pushing back on the skateboard.
400
Newton's 2nd
500
2 factors that affect friction:
1.) surface types 2.) amount of force between objects
500
What is the net force?
50N to the right
500
List the three (3) possibilities that an object might demonstrate when subjected to an unbalanced force:
Speed up, slow down, or change direction
500
The nozzle of a rocket is pointed downward so that as fuel is ignited, the exhaust pushes downward. Why is this arrangement necessary for a rocket to function properly?
As fuel is combusted, the rocket pushes the gases backward and the gases push the rocket forward.
500
Explain your answer