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Ty Phy Sci Chpt 5

Matter in Motion

QuestionAnswer
when an object changes position over time when compared with a reference point motion
the rate at which an object moves, depends on the distance traveled and the time taken to travel that distance speed
the speed of an object in a particular direction velocity
the rate at which velocity changes acceleration
What two things must you know to determine speed? distance and time
What is the difference between speed and velocity? Speed involves distance over time. and velocity involves distance over time in a particular direction
Does a change in direction affect acceleration? Explain. Acceleration is a measure of velocity change. Velocity is speed in a given direction. Therefore, velocity changes if direction changes, and there is acceleration
simply a push or a pull force
the unit of force newton
the force that results from combining all the forces exerted on an object net force
forces that are equal, and therefore, produce no motion balance forces
when the net forces on an object are not zero and produce a change in motion unbalanced forces
a force that opposes motion between two surfaces that are touching friction
Name two ways in which friction can be increased. making the surfaces rougher and increasing the force pushing the surfaces together
a force of attraction between objects that is due to their masses gravity
a measure of the gravitational force exerted on an object weight
the amount of matter in an object mass
Created by: beth2244
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