# P2a Revision Year 11 mock

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equation for power?
P= work done or energy transferred / time!
1 of 6
watt is power measured in? hahahahahahaha!!!!
joules/second. 1 j/s = 1W
2 of 6
Formula for momentum?
mass x velocity in kgm/s
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In a CLOSED system, what happens to momentum?
It is conserved! Momentum before = momentum after
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what two cases might you apply the consevation of momentum?
collisions and explosions
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what are regenerative brakes and why are they nifty?
they run they car's engine backwards to slow it down. it also converts the kinetic energy into electrical energy that has been stored as chemical energy in the car's battery. (wastes less basically)
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## Other cards in this set

### Card 2

#### Front

watt is power measured in? hahahahahahaha!!!!

#### Back

joules/second. 1 j/s = 1W

### Card 3

#### Front

Formula for momentum?

### Card 4

#### Front

In a CLOSED system, what happens to momentum?

### Card 5

#### Front

what two cases might you apply the consevation of momentum?