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## Homework Statement

Assuming equal rates of acceleration in both cases how much further would you travel if braking from 56mi/h to rest than from 28mi/h ?

a, 5.2 times farther

b, 4.8 times farther

c, 3.2 times farther

d, 4.0 times farther

## Homework Equations

not really sure what i should use.

v=v0+at

x= x0+2a(x-x0)

## The Attempt at a Solution

0-56/0-28=56/28=2