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### 19 Cards in this Set

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• Back
 What is FORCE A push or a pull What is NET FORCE? The sum of all forces on an object. What are unbalanced forces? Unbalanced forces change the motion of an object. What are balanced forces? Balanced forces do not change the motion of an object. What is Inertia? Inertia is the tendency of an object to resist changes in motion. What is Mass? Mass is the amount of matter in an object. What is a newton? A newton is the unit of measure for force. What is friction? the force that one surface exerts on another when they rub against each other What is gravity? Gravity is an attractive force that pulls all objects together What is free fall? the motion of a falling object when gravity is the only force acting on the object What is weight? Weight is the force of gravity on an object (mass x 9.8 m/s/s) What is air resistance? A type of fluid friction that acts on objects as they fall through the air. This is an upward force. What is a projectile? Anything that is thrown What is Newton's First Law of Motion? An object at rest will remain at rest;an object in motion will remain in motion unless acted upon by an outside,unbalanced force What is Newton's Second Law of Motion? Force = Mass x Acceleration What is momentum? Momentum is the product of mass and velocity (How much force does it take to stop something) What is the law of conservation of momentum? states that the total momentum is the same before and after an event (as long as there are no other forces at work) What is a satellite? A satellite is any object orbiting another in space What is centripetal force? Centripetal force is a center seeking force (circular motion)