# The brakes are applied on a car traveling at 30. m/s [fwd]. The car stops in 3.0s. What is its displacement during this time?

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The answer is 45 m [fwd], but I do not understand how to get to this answer.

The answer is 45 m [fwd], but I do not understand how to get to this answer.

##### 1 Answer

Dec 26, 2016

#### Answer:

You can use the equations of motion to find the displacement, as shown below.

#### Explanation:

If we are assuming that the acceleration is uniform (which I believe must be the case), you can use the following equation of motion, as it does not require that you know, or first calculate the acceleration:

This basically says that the displacement

Insert the numbers