Types of Forces
A push or a pull on an object.
What is a force?
The attractive force that exists between all objects with mass.
What is gravity?
The combination of all the forces acting on an object.
What is net force?
Any motion in which an object moves along a curved path.
What is circular motion?
A measure of how hard it is to stop a moving object.
What is momentum?
A push or pull on one object by another that is touching it.
What is a contact force?
The amount of matter in an object.
What is mass?
Forces acting on an object that combine and form a net force of zero.
What are balanced forces?
A force that acts toward the center of a curve in circular motion.
What is centripetal force?
The forces two objects apply to each other.
What is a force pair?
A force that one object can apply to another object without touching it.
What is a noncontact force?
The gravitational force exerted on an object.
What is weight?
Forces acting on an object that combine and form a net force that is not zero.
What are unbalanced forces?
In our solar system, this force acts as the centripetal force that keeps planets orbiting the Sun.
What is gravity?
This law says the total momentum of a group of objects stays the same unless outside forces act on them.
What is the Law of Conservation of Momentum?
A force that resists the motion of two surfaces that are touching.
What is friction?
The tendency of an object to resist a change in its motion.
What is inertia?
Newton’s First Law.
What is an object in motion stays in motion unless acted on by a force, and an object at rest stays at rest unless acted on by a force.
What would happen to a planet’s orbit if centripetal force disappeared?
What is it would fly off in a straight line?
A baseball has more momentum than a ping-pong ball because it has more ___.
What is mass?
The force that slows two surfaces sliding past each other.
What is sliding friction?
This law states that all objects are attracted to each other by a gravitational force.
What is the Law of Universal Gravitation?
Newton’s Second Law
F = MA
The direction centripetal force acts in circular motion.
What is toward the center, perpendicular to motion?
Momentum depends on an object’s mass and its ____.
What is velocity (or speed)?