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Chapter Cinco JL

I like turtles

QuestionAnswer
Motion When an object changes in position over time & is compared with a reference point
Speed rate at which object moves
Average Speed Formula Total distance/total time
Velocity Speed of object in particular direction
What can cause velocity to change Change in speed or direction
Acceleration Rate at which velocity changes
Acceleration is how fast __________ changes Velocity
Acceleration Formula Final velocity-starting velocity/time it takes to change velocity
Positive Acceleration & Examples Acceleration in which velocity increases - a plane taking off
Negative Acceleration & Examples Acceleration in which velocity decreases (deceleration) - a car stopping at a stop sign
Centripetal Acceleration & Example Acceleration that occurs in a circular motion - the blades of a windmill constantly rotating
Force A push or pull. All have size & direction.
Newton (N) Unit used to express force
Net Force-Force that results from combining all forces exerted on given object
Why unbalanced forces are necessary to cause movement They produce the change in motion
Balanced Forces When forces applied to an object produce a net force of zero
Friction Force that opposes motion between 2 touching objects
Source of Friction When the surface of any object is rough
Relationship between greater force & friction Greater force will result in more friction
Sliding Friction Opposes movement of objects
Rolling Friction Less force than sliding friction (ex-wheel)
Fluid Friction Less friction itself than in sliding friction
Ways to reduce friction Lubricants, sandpaper
Ways to increase friction make surfaces rougher (ex-Batting gloves, salting an icy road)
Gravity Force of attraction between objects that is due to their masses
Why force must be used to lift objects Gravity
What the Law of Universal Gravitation states 1. Gravitational force- small between objects with small masses. 2. Gravitational force- larger between objects with larger masses. 3. Distance between 2 objects increasing will result in the reducing of gravitational force pulling them together
Created by: PhySciLewis1
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