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134301
Car Safety
Description
Mind Map on Car Safety, created by milliewernyj17 on 17/06/2013.
Mind Map by
milliewernyj17
, updated more than 1 year ago
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Created by
milliewernyj17
over 11 years ago
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Resource summary
Car Safety
Momentum= Mass x Velocity
The greater the mass of an object, the greater the velocity and the more momentum it has
Momentum is a vector quantity, this is because it has a size and direction
momentum before= the momentum after
When a force acts on an object, then this causes a change in momentum
Larger force=faster change of momentum
In a car crash, a car will have a huge momentum as it changes very quickly. The forces in the body are very large and more likely to cause an injury
Cars are protected with protective features to slow people down in a crash. The longer it takes for a change in momentum, the smaller the force
Features in cars which slow down momentum:
Crumple zones- front of the car crumples on impact, increasing the time taken for the car to stop
Seat Belts- stretch slightly, which increase the time taken for the wearer (of the seatbelt) to stop, reducing the forces acting on the chest
Air bags- slow you down more gradually
Bubble wrap also helps for fragile objects; increasing time so it reduces the forces of the object (force is smaller)
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