Vocabulary
Simple Questions
Friction
Friction and Gravity
Friction and Gravity
100
These cause all changes in motion.
What are forces.
100
Kicking a ball, for example.
What is exerting a force?
100
When two solid surfaces slide over each other.
What is sliding friction?
100
The force of gravity acts between all objects in the universe that have mass.
What is the law of universal gravitation?
100
What Earth exerts on you and is displayed as weight on a bathroom scale.
What is gravitational force?
200
The measurement of the strength of a force.
What is a newton
200
This happens to an object when two forces act in opposite directions.
What is it will move in the same direction as the greater force.
200
The force that keeps you from moving an object.
What is static friction?
200
This happens to gravitational force as distance between objects increase.
What is decrease?
200
The amount of matter in an object.
What is mass?
300
This is used to represent the direction and strength of a force.
What is an arrow?
300
How a force is described.
What is by its strength and by the direction in which it acts.
300
When a solid object moves through a fluid.
What is fluid friction?
300
This is the measure of the force of gravity on an object.
What is weight?
300
When you push a couch that doesn't move, for example.
What is static friction?
400
It determines how and if an object will move.
What is net force?
400
The combination of all forces acting on an object.
What is net force?
400
When an object rolls across a surface.
What is rolling friction?
400
This occurs when the irregularities of one surface come into contact with another surface.
What is friction?
400
When a ball is thrown in the air, for example.
What is fluid friction?
500
These do not change the motion of an object.
What are balanced forces.
500
A push or a pull.
What is force.
500
A fluid other than water.
What is air?
500
This is what you need to increase in order to push something across a surface as friction increases.
What is applied force?
500
Friction acts in this direction compared to the direction of the object's motion.
What is opposite?
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