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ch. 5 jonathan pak

QuestionAnswer
Ch 5 Matter in Motion Terms
Motion When an object changes position over time when compared with a reference point
Speed rate at which an object moves
Average Speed Formula total distance/total time
Velocity speed of an object in a particular direction
What can cause velocity to change? (2 things) positive acceleration and negative acceleration
Acceleration rate at which velocity changes
Acceleration is how fast what changes? velocity
Acceleration Formula final velocity-starting velocity/time it takes to change velocity
Positive Acceleration & Examples plane taking off, driving down a hill
Negative Acceleration & Examples car stopping at a stop sign, bicycle slowing down
Centripetal Acceleration & Example jogging on a winding trail, driving around a corner, standing at Earth’s equator
Force push or pull
Newton (N) unit that scientists use to express force
Net Force the force that results from combining all the forces exerted on an object
Why are unbalanced forces necessary to cause movement?
Balanced Forces
Friction force that opposes motion between two surfaces that are touching
Sources of Friction
Relationship between greater force & friction
Sliding Friction
Rolling Friction
Fluid Friction
Ways to reduce friction lubricants
Ways to reduce friction sandpaper
Ways to increase friction make surfaces rougher
Section 4
Gravity force of attraction between objects that is due to their masses
Why must force be used to lift objects?
What does the Law of Universal Gravitation state? (3 parts)
Created by: 200199611
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