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ch 5 holt
ch 5 physical science holt book
Question | Answer |
---|---|
what is motion | an objects change in position relative to a reference point |
what is speed | the distance traveled divided by the time interval during which the motion occured |
what is velocity | the speed of an object in a particular direction |
what is acceleration | the rate at which velocity changes over time |
what is force | a push or pull exerted on an object in order to change the motion of the object |
what is newton | the si unit for force |
what is net force | the combination of all forces acting on an object |
what is friction | a force that opposes motion between two surfaces that are in contact |
what is gravity | a force of attraction between two objects that is due to other masses |
what is weight | a measure of the gravitational force exerted on an object |
what is mass | a measure of the amount of mater in an object |