Friction
Force
Scientifically Speaking
Key Terms
Newton's Laws
100
What is static friction?
100
A force is describe by its __________ and _______.
What is strength and direction?
100
In order to know if something is moving, you must have a ___________
What is a reference point?
100
An object that is thrown.
What is a projectile?
100
acceleration depends on the object’s mass and on the net force acting on the object.
What is Newton’s Second Law of motion?
200
What is sliding friction?
200
A type of force acting on an object that causes a change in direction or a movement of the object.
What is an unbalanced force?
200
In order to determine the speed of an object, you must know _______ and ________.
What are distance and time?
200
The force of gravity on an object at the surface of a planet.
What is weight?
200
An object at rest will remain at rest, and an object moving at a constant velocity will continue moving at a constant velocity, unless it is acted upon by an unbalanced force.
What is Newton’s First Law of motion?
300
What is rolling friction?
300
A force acting on an object that doesn't result in change of direction or movement of the object.
What is a balanced force?
300
Acceleration occurs when
What is a change in direction, increase in speed or decrease in speed?
300
The amount of matter in an object -- it is the same on the Earth and Moon.
What is Mass?
300
The tendency of an object to resist any change in its motion.
What is inertia?
400
What is fluid friction?
400
The unit of measurement for force.
What is a Newton?
400
To determine velocity you must know _______ and __________.
What are speed and direction?
400
In a free fall, the unbalanced force which causes an object to accelerate.
What is gravity?
400
if one object exerts a force on another object, then the second object exerts a force of equal strength in the opposite direction on the first object. -- For every action, there is an equal but opposite reaction.
What is Newton’s Third Law of motion?
500
The strength of the force of friction depends on these two things.
What are how hard the surfaces push together and the type of surfaces involved?
500
The two factors that affect gravitational attraction between objects.
What are the mass of the objects and the distance between the objects?
500
A force that causes an object to move in a circle.
What is Centripetal Force?
500
The rule that in the absence of outside forces that total momentum of objects that interact does not change.
What is the law of conservation of momentum?
500
Newton's laws are all about this. It is a push or a pull.
What is a force?