Physics
Help!
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| units used for force | Newtons [n]
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| units used for pressure | newtons/centimeters2 [n/cm2]
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| units used for area | centimeters2 [cm2]
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| units used for distance | meters [m]
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| units used for speed | meters/second [m/s]
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| units used for reaction time | seconds [s]
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| units used for velocity | meters/second [m/s]
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| units used for length | meters [m]
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| units used for width | meters [m]
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| how are mass and weight different | mass is a measurement of matter and weight is a measurement of how gravity affects mass
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| define force | a push or a pull
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| whats the formula for pressure | p=f/a
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| as a mass increases an objects inertia ... | increases
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| define inertia | an objects resistance to a change in state of motion
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| why is newtons first law also called "the law of inertia" | because newtons first law is based on the property of inertia
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| what is newtons 1st law | an object in motion stays in motion, an object at rest stays at rest unless acted on by an outside force
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| define constant speed | a speed that doesnt change
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| define instantaneous speed | a speed at a particular instant in time
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| define average speed | total distance divided by total time
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| can average speed and instantaneous speed be the same? when? | yes when traveling at a constant speed
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| what is the distance between speed and velocity | velocity includes direction and speed does not
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| -whats the speed formula -re-write it, solved for time - re-write it, solved for distance | -s=d/t -t=d/s -d=t*s
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| as a driver increases his/her speed the minimum safe following distance ... ( increases or decreases) | increases
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| how does talking on a cell phone affect a drivers reaction time (increases it or decreases it) | increases it
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| what is the minimum safe following distance measuring | the distance traveled before a person reacts
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| when measuring a reaction time, what two events are we measuring the time between | when an event occurs and when a person reacts
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Created by:
rachel111
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