A car moving at 12 m/s applies its brakes and comes to a stop in 2 s. What was its acceleration?

6 m/s²

Explanation:

The acceleration of an object given it's velocity and time taken can be found by using the formula

where

a is the acceleration

v is the velocity

t is the time

From the question we have

We have the final answer as

6 m/s²

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Rate law for this reaction israte of the reaction = k[a]²[b].second order in a  means concentration of a in power of two, and  first order in b means concentration of b in power of one.