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fin. velocity- starting time/ time it takes to change velocity

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Kilograms

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a measure of the amount of matter in an object. ALL OBJECTS HAVE MASS!

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a measure of the gravitatinal force exerted on an abject

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All objects in the universe attract each other through gravitational force.

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Why do objects fall toward Earth. What keeps planets moving in the sky

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Gravity is a result of mass. All matter has mass

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force, net force, newton

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The rate at which velocity changes over time,
Final velocity-- starting velocity/ time it takes to change velocity

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Important factors: speed and direction. Average speed = total distance/ total time

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Total distance /
Total time

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Objects uses to tell if something is in motion. ex, a hot air balloon and a bird

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substances applied to surfaces to redeuce friction

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non-moving, goes away as soon as kinetic friction starts

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moving

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The force that opposes motion, the amount of friction depends on the roughness of the surfaces