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1. Why do objects fal

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SI unit for mass = kg

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an object's mass does not change

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a measure of the amount of matter in an object

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you must apply forces to overcome Earth's gravitational

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All matter has mass. Gravity is a result of mass.

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the force of gravity can change the motion of an object by changing its speed, direction, or both

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the size of the force depends on the masses of the objects and the distance between objects

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the moon's gravitational force 1.6 of Earth's

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weight changes when gravitational force changes

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the sun is 93 million miles from Earth

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car tires moving a car forward

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car engine parts wearing out

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final velocity- start velocity
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time it takes to change velocity

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velocity must include a reference direction

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velocity must include

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the object that appears to stay in place

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the SI unit for speed is km/h or miles

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just because a force acts on an object doesnt mean that push will occur

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all forces have both size

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all forces have both size & direction

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the SI unit for the force

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is the combination all of the forces acting on an object

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strength or energy as an attribute of physical action or movement

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the rate at which velocity changes over time; an object accelerate if its speedy direction, or both change

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the speed of an object in a particular direction

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the distance traveled divided by the time interval during which the motion ocurred

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an object's change in position relative to a reference point

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static friction disappears as soon as an object starts moving

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moving

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not moving

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a force that opposes motion