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20 Cards in this Set
- Front
- Back
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friction
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force that opposes motion
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what does gravity depend on?
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mass and distance
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difference between mass and weight
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mass is the amount of matterin an object and weight is the pull of gravity on the object.
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acceleration
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rate of change in velocity
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formula for acceleration
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a = vf-vi/t
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law of conservation of momentum
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the total amount of momentum does not change unless an outside force acts on it.
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equation for force
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F = ma
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unit of force
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newton
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acceleration due to gravity
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9.8 m/s2
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formula for velocity
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v= d/t
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SI unit of velocity and speed
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m/s
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SI unit of time
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second
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SI unit of distance
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meter
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SI unit of mass
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kg
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1st law of motion
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An object at rest will remain at rest unless acted on by a net force.
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inertia
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object's resistance to motion
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2nd law of motion
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an object wil accelerte in the dirction of an unbalanced force.
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3rd law of motion
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for every action there is an equal and opposite reaction
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SI unit for work and energy
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Joule (J)
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formula for work
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W = Fd
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