A force that opposes motion between two surfaces that are in contact with each other.
What is friction?
100
This is the force that attracts objects because of their masses.
What is gravity?
100
This is what the First Law of Motion is also know as.
What is the Law of Inertia?
200
The speed of an object in a certain direction.
What is velocity?
200
This is what you do to combine forces that are acting on an object in the same direction.
What is adding the forces together?
200
The amount of friction depends on these two things.
What is the amount of the force applied and the amount of roughness the surface has?
200
Gravitational force decreases as this increases.
What is distance?
200
The tendency of all objects to resist any change in motion.
What is Inertia?
300
This is the formula for acceleration.
What is acceleration= final velocity-starting velocity/time.
300
The combination of all of the forces acting on an object.
What is the net force of an object?
300
This is what causes friction.
What do the hills and valleys of surfaces cause when they stick together cause?
300
Gravitational force increases as this increases.
What is mass?
300
The Second Law of Motion states that the acceleration of an object depends on these two things.
What is the amount of mass and the amount of force?
400
This is the effect of an increase in velocity.
What is a positive acceleration?
400
This is when the forces on an object have a net force of 0 Newtons.
What is a balanced force?
400
These are the two types of friction.
What are static and kinetic friction?
400
This describes the relationship between gravitational force, mass, and distance.
What is the Law of Universal Gravitation?
400
This Law of Motion states that the an object at rest will remain at rest and an object in motion will remain in motion unless an unbalanced force acts acts on it.
What is the First Law of Motion?
500
This is the unit for calculating acceleration.
What is meters per second per second or meters per second squared?
500
This the the unit that net forces are measured in.
What is a Newton?
500
These are ways to reduce friction.
What are lubricants, rolling kinetic friction, and making surfaces smoother?
500
This is the reason why people confuse the terms mass and weight.
What is because they are both constant on Earth and because they think that weight is measured in kilograms instead of Newtons?
500
The Third Law of Motion states that all forces have these two things.