Momentum & Safety (OCR GCSE Physics A (Gateway Science Suite)): Flashcards
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Practise the cards
12 cards from this deck
Effect of hard braking
Effect of hard braking
Large deceleration
Result of large deceleration
Result of large deceleration
Large force on passengers and car
Danger of large forces during braking
Danger of large forces during braking
Can cause injury (e.g., neck whiplash)
Why large deceleration causes large force
Why large deceleration causes large force
Large change in momentum over short time
Why are seatbelts needed?
Why are seatbelts needed?
Prevent flying through windscreen during hard braking
How seatbelt stretching reduces force
How seatbelt stretching reduces force
Extends time to stop, reduces rate of momentum change
What crumple zones are
What crumple zones are
Softer areas at front of car that crumple on crash
Crumple zone function
Crumple zone function
Absorb energy to deform and compact
How crumple zones reduce force
How crumple zones reduce force
Increase time taken for car to stop
Effect of crumple zones on acceleration
Effect of crumple zones on acceleration
Reduces acceleration and force on passengers
Airbag activation
Airbag activation
Inflate instantaneously upon crash
How airbags reduce force on neck
How airbags reduce force on neck
Increase time for head to stop moving