Gravity and Friction
A push or pull on one object by another that is touching it
What is a contact force?
The combination of all the forces acting on an object.
What is a net force?
The acceleration of an object is equal to the net force acting on the object divided by the object's mass.
What is Newton's Second Law of Motion?
When one object exerts a force on a second object, the second object exerts an equal force in the opposite direction on the first object.
What is Newton's Third Law of Motion?
A force that one object can apply to another object without touching it.
What is a noncontact force?
Forces acting on an object that combine and form a net force of zero.
What are balanced forces?
Any motion in which an object is moving along a curved path.
What is circular motion?
The forces two objects apply to each other.
What is a force pair?
An attractive force that exists between all objects that have mass.
What is gravity?
Forces acting on an object that combine and form a net force that is not zero.
What are unbalanced forces?
A force that acts perpendicular to the direction of the motion, toward the center of the curve.
What is centripetal force?
A measure of how hard it is to stop a moving object.
What is momentum?
Developed by Sir Isaac Newton, states that all objects are attracted to each other by a gravitational force.
What is the Law of Universal Gravitation?
If the net force on an object is zero, the motion of the object does not change.
What is Newton's First Law of Motion?
Any object in space that orbits a larger object.
What is a satellite?
The total momentum of a group of objects stays the same unless outside forces act on the objects.
What is the Law of Conservation of Momentum?
A force that resists the motion of two surfaces that are touching. Examples include static, sliding, and fluid.
What is friction?
The tendency of an object to resist a change in its motion.
What is inertia?
This can change an object's velocity.
What are unbalanced forces?
One object transfers momentum to another object.
What is a collision?