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  • Created by: Hettie
  • Created on: 07-06-13 20:35
What is Newton's 3rd law?
Every action has an equal and opposite reaction.
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What is the equation for momentum?
Momentum (kg m/s) = mass (kg) X velocity (m/s) P=mv
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What is conservation of momentum?
initial total momentum = final total momentum
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What is the equation for kinetic energy?
kinetic energy (J) = ½ m (kg) X v² (m/s)
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What is the equation for impact force?
Force (J) = change in momentum ÷ time F = (mv - mu) ÷ t
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What does a seat belt or air bag do to reduce impact force?
Increases time for person to stop, reducing rate at which momentum changes, therefore force of impact is less.
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Other cards in this set

Card 2

Front

What is the equation for momentum?

Back

Momentum (kg m/s) = mass (kg) X velocity (m/s) P=mv

Card 3

Front

What is conservation of momentum?

Back

Preview of the front of card 3

Card 4

Front

What is the equation for kinetic energy?

Back

Preview of the front of card 4

Card 5

Front

What is the equation for impact force?

Back

Preview of the front of card 5
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