Details Title: Chapter 1 Matter in Motion Description: measuring motion, forces, friction & Gravity Total Flash Cards: 22 Created: 10/01/2007 10:24:15		New Users: To study from this flashcard set, or to create your own your own study flash cards, REGISTER HERE. Existing Users: CLICK HERE. Additional Physics Flashcards
Cards in this set: Term MOTION Definition an objects change in position realtive to a reference point Term SPEED Definition The distance traveled divided by the time taken for motion to occur Term Label for Speed Definition meters per second m/s Term VELOCITY Definition speed of an object in a particular direction Term ACCELERATION Definition rate at which velocity changes over time Term FORMULA FOR ACCELERATION Definition Final velocity - initial velocity __________________________________ Time Taken Term Label for ACCELERATION Definition meters per second per second m/s/s Term FORCE Definition a push or pull exerted on an objet in order to change the motion of the object; has size and direction Term NEWTON Definition the SI unit for force. Symbol=N Term NET FORCE Definition the combination of all forces acting on an object Term BALANCED FORCE Definition net force = 0 newtons does not cause change in motion of object ex. house of cards light hanging from ceiling Term UNBALANCED FORCE Definition net force NOT = to 0 newtons causes a change in motion, speed &/or direction of object ex. kicking a ball Term FRICTION Definition a force that opposes motion between 2 surfaces that are in contact Term KINETIC FRICTION Definition friction between moving surfaces Term 2 FACTORS THAT AFFECT FRICTION Definition 1. amount of force applied 2. roughness of surfaces in contact Term SLIDING KINETIC FRICTION Definition kinetic friction where the 2 surfaces slide past eachother ex. pushing a box across the floor Term ROLLING KINETIC FRICTION Definition one surface rolling over the other usually via wheels. ex. bicycle any mode of transportation w/ wheels Term STATIC FRICTION Definition when a force is applied to an object but the object DOES NOT move. *this disappears as soon as the object begins to move* Term LUBRICANT Definition substances applied to surfaces to reduce friction between the 1 surfaces Term GRAVITY Definition force of attraction between objects that is due to their masses Term LAW OF UNIVERSAL GRAVITATION Definition *describes the relationship between gravitational force, mass and distance *Isaac Newton *force increases as mass increases *force decreases as distance increases Term WEIGHT Definition measure of the gravitational force exerted on an object; value can change depending on location of the object in the universe