P8.1
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Last updated 7:11 PM on 11/4/22
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11 Terms
1
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stopping distance formula
stopping distance = thinking distance + braking distance
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thinking distance formula
thinking distance = speed x reaction time
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force formula (P8)
force = (final momentum - initial momentum) / time
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thinking distance
the distance a car travels while the driver reacts to a hazard
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factors which affect thinking distance
-alcohol
-drugs / some medicines
- distractions
-speed
-tiredness
-age
-drugs / some medicines
- distractions
-speed
-tiredness
-age
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braking distance
the distance a car travels while the force of the brakes is applied to the car
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factors which affect braking distance
-surface of road
-weather
-type of tyres
-speed
-weather
-type of tyres
-speed
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an elastic collision
momentum is conserved, total energy is conserved and total kinetic energy is conserved
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In an inelastic collision
momentum is conserved, total energy us conserved but total kinetic energy is not conserved
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factors which affect the force of an impact
-mass
-∆velocity
-duration of an impact
-∆velocity
-duration of an impact
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things which reduce the impact of a collision
seatbelts - stretch to increase time taken to stop
airbags - inflate to increase time taken to stop
crumple zones - crumple/fold to increase time taken to stop
(the longer the impact lasts the greater the impact force is reduced)
airbags - inflate to increase time taken to stop
crumple zones - crumple/fold to increase time taken to stop
(the longer the impact lasts the greater the impact force is reduced)