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# Forces

### Chapter 2 Quiz

How is Force described? Its strength and the direction in which it acts
What does Unbalanced Forces acting on an object result in? A net force and a change in the object's motion
Does Balanced Forces acting on an object change the object's motion? No, it does not change the object's motion
A push or pull Force
The strength of a force is measured in the SI unit Newton
The combination of all forces acting on an object Net Force
Forces that produce a nonzero net force, which changes an object's motion Unbalanced Forces
Equal forces acting on an object in opposite directions Balanced Forces
Force that two surfaces exert on each other when they rub against each other Friction
Friction that acts on objects that are not moving Static Friction
Friction that occurs when one solid surface slides over another Sliding Friction
Friction that occurs when an object rolls over a surface Rolling Friction
Friction that occurs as an object moves through a fluid Fluid Friction
A force that pulls objects toward each other Gravity
A measure of the amount of matter in an object Mass
The force of gravity on a person or object at the surface of a planet Weight
When the only force acting on an object is gravity Free Fall
Objects falling through air experience a type of fluid friction Air Resistance
The greatest velocity a falling object reaches Terminal Velocity
An object that is thrown Projectile
Motion in a straight line Linear Motion
Series of small but fast back and forth movements or side to side Vibrational Motion
Motion along a curved path Projectile Motion
Circular motion of an object Centripetal Motion
Spinning motion around a fixed/stationary point Rotational Motion
An object at rest ail remain at rest, and an object moving at a constant velocity will continue moving at a constant velocity, unless it is acted upon by an unbalanced force Newton's First Law of Motion
The tendency of an object to resist a change motion Interia
How do you get Acceleration? Net Force / Mass
Acceleration depends on the object's mass and on the net force acting on the object Newton's Second Law of Motion
A characteristic of a moving object that is related to the mass and the velocity of the object Momentum
In the absence of outside forces, the total momentum of objects that interact do not change Law of Conservation of Momentum
If one object exerts a force on another object, then the second object exerts a force of equal strength in the opposite direction on the first object Newton's Third Law of Motion
How do you get Momentum? Mass x Velocity
Created by: Flyseppe