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Physics - Coggle Diagram
Physics
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• momentum of A after the explosion z(mass of Ax velocity of momentum of B after the explosion = (mass of B. xvelocity of B). total momentum before the explosion=Do(because bath. =
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(mass of Axuelodity of A) +(mass of Bxvelocity of B)=0 (mass of Axvelocity of A) ==(mass of B xvelocity of B)
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*Momentum is a vector quantity, so if a objects are travelling in opposite directions one has positive momentum and the other has negative momentum.
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Crumple zones at the front end and rear end of a car are designed to lessen the force of an impact. The force changes lof the cor the momentum
• In a front-end impact, the momentum of the car is reduced • In a rear end impact (where a vehicle is struck from behind by another vehicle), the
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The longer the impact time, the more the impact force is reduced
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car safety time taken to stop someone in a car is longer they are wearing a seat belt than if they are not. So the declarating force
is reduced by wearing a seat belt. - the seat belt acts across the chest, so it
sper spreads the fore out the Without the seat belt, the force would act on the person's head when it hit the windscreen.
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The conservation of momentum applies to any collision we can use of momentun object This where where to no external forces act. the principle of conservation work out the velocity of an after a collision with method two can be another object. applied to objects collide any collision Straight line.
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(mass of A velocity of A(mass of Bx velocity.B=O Crumple zones in cars ae designed to reduce risk to human in car
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The longer the impact time, the more impact force is educed.
If you know the impact time, you can calculate
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mass (igt Change of relocity, AV (m/s) f = time taken, t (s)
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