Momentum Flashcards

(6 cards)

1
Q

momentum

A

the (vector) quantity of motion of a moving body

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2
Q

conservation of momentum

A

total momentum before = total momentum after

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3
Q

momentum safety features

A
  • Time taken for change in momentum increases
  • force decreases
  • reduces impact
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4
Q

Crumple Zones

A
  • crumple on impact - rather than stopping suddenly
  • increases time
  • reduces force on person
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5
Q

Seat Belts

A

stretch slightly
- stop person flying out of car
- increase time for person to reach stillness

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6
Q

Airbags

A
  • compressable
  • slow person down gradually
  • increases time
  • reduces force
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