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5thgrscich15sorta
5th grade-science
Question | Answer |
---|---|
speed | a measure of how far something travels in a certain period of time. |
kilometers per hour | the number of kilometers something can travel in an hour |
velocity | a measure of speed in a certain direction |
inertia | the tendancy of an object to remain in motion unless an outside force causes a change |
gravity | a force that acts to pull pairs of objects together |
mass | the amount of matter in an object |
weight | the force gravity exerts on an objects mass |
acceleration | rate of change in speed or direction of movement |
friction | a force that resists the movement of one surface past another surface |
air resistance | friction caused by gas molecules in the air hitting an object and slowing it down |
streamline | to design smooth round objects so it slips through the air with the least possible resistance |