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ch 2 section 1,2,n,3

Vocabulary from Chapter 2 Section Three from motion, forces and energy.

QuestionAnswer
Force A push or a pull.
Net Force The overall force on an object when all the forces are added together.
Unbalanced Force A nonzero force, which changes an object's motion.
Inertia The tendency of an object to resist change in it's motion.
Mass The amount of matter in an object.
Newton A unit of measure that equals the force required to accelerate one kilogram of mass at 1 meter per socone per sencond.
Friction The force that one surface exerts on another when the two rub against each other.
Sliding Friction Friction that occurs when one solid surface slides over another.
Rolling Friction Friction that occurs when an object rolls over a surface.
Fluid Friction Friction that occurs as an object moves through a fluid or gas.
Gravity The force that pulls objects towards each other.
Free Fall The motion of a falling object when the only force acting on it is gravity.
Projectile An object that is thrown.
Air Resistance The fluid friction experienced by objects falling through sir.
Terminal Velocity The maximum velocity a falling object can achieve.
Weight The force of gravity on an object at the surface of the planet.
Created by: Sarah11
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