- #1

Just_enough

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## Homework Statement

A. A car moving at speed v can stop in distance d in time t. The same car moving on the same road at twice the speed takes what distance and what time to stop?

Answer:

**a)**Distance d and time t/2.

**b)**Distance 2d and time t.

**c)**Distance 4d and time 2t.

**d)**Distance 2d and time 2t.

**e)**Not possible to determine.

## Homework Equations

A. V

_{f}= V

_{i}+2ad?

B. W = F*D?

## The Attempt at a Solution

A.I assume that you would have to use velocity equation to figure this out, but I don't understand how you can use the equation if there is no numbers given...

B. I tried to find the work of the obj then set it equal to the work done on the person (pulling) and divide by force to find distance, and got 20... is this not the right equation?

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