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Chapter 3- Forces and Motion. Motion. _____________ is a change in the position of an object. The force that pulls all objects toward each other is ______________. gravity. A _______________ is a place or object used to determine if an object is in motion. reference point. Speed.
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Motion _____________ is a change in the position of an object.
The force that pulls all objects toward each other is ______________. gravity
A _______________ is a place or object used to determine if an object is in motion. reference point
Speed ____________ is the rate at which an object changes position.
Velocity ____________ is the speed and the direction an object is moving.
Objects move in _____________________, _____________________, or ____________________. straight lines in curved paths back and forth
The mass of an object affects the _________ needed to change its motion. force
Acceleration _______________ is the change in speed or direction of an object.