P2 - Forces Flashcards
1
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equation for speed
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speed (m/s) = distance (m) / time (s)
2
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equation for velocity
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velocity = displacement / time
3
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what are scalar quantities
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- has magnitude (size) only
> e.g. mass, temperature, time, speed, distance, energy, power
3
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what are vector quantities
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- has magnitude (size) and direction
> e.g. displacement, velocity, acceleration, force, moment
4
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what is the difference between displacement + distance
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- distance = scalar - measured along actual path taken form A to B
- displacement = vector - measured along straight line from A to B - has direction as it’s vector
5
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what objects are used to measure distance
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- metre ruler (lessons)
- larger distances = measuring (trundle) wheel
5
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what objects are used to measure time
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- stopwatch
- light gate
5
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what is acceleration
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- change in velocity over time
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6
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what is the equation for acceleration
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- acceleration (m/s*2) = change in velocity (m/s) / time taken
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