A 1500kg car slows from 45km/h[E] to 30km/h[E]

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a 1500kg car slows from 45km/h[E] to 30km/h[E]. What is the impulse from the brakes?
 
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This should probably be posted in the homework help section.

Nautica
 
45km/h = 12.5m/s
30km/h = 8.3333m/s

I = mdv
I = (1500) x (8.333 - 12.5)
I = -6250kgm/s
 

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