Motion
Even if it seems like you aren’t moving, you are still in what?
Motion
A push or pull.
Force
Newtons First Law of Motion states?
An object at rest will stay at rest, and that an object is moving at constant velocity will continue moving at constant velocity, unless acted on by an unbalanced force.
What is Friction?
The force that one surface exerts on another when the two rub against each other.
True or False: Gravity is a kind of force.
True.
A place or object used for comparison to determine if something is in motion.
Reference Point
The overall force on an object after all the forces are added together.
net force
What factors do the strength of the force of friction depend on?
The types of surfaces involved and how hard the surfaces push together.
When the only force acting on a falling object is gravity, the object is said to be in what?
Free fall.
The distance an object travels in one unit of time.
Speed
When there is a net force acting on an object, the forces are said to be what?
Unbalanced
Newton‘s second law of Motion explains what?
What is sliding friction?
When solid surfaces slide over each other.
The force of gravity on a person or object at the surface of a planet.
Weight.
Speed in a given direction.
Velocity
Equal forces acting on one object in opposite directions.
balanced forces
What is the equation for acceleration?
Acceleration = Force ÷ Mass.
What is rolling friction?
When an object rolls over a surface.
The measure of the amount of matter in an object.
Mass.
The rate at which velocity changes.
Acceleration
True or False: When you add equal forces exerted in opposite directions there is zero net force.
True
What does Newtons third law of Motion state?
If one object exerts a force on another object, then the second object exerts a force of equal magnitude in the opposite direction on the first object.
What is fluid friction?
When an object moves through a gas or a liquid.
True or False: When you drop something, it will fall to the ground.
True.