I have an answer to this question and then a question:(adsbygoogle = window.adsbygoogle || []).push({});

A car with a mass of 1,000kg moves at 20 m/s. What is the braking force needed to bring the car to a halt in 10s.

I used m2v2-m1v1 and came up with -20,000 kg(m/s)

then -20,000kg(m/s)/10s

I came up with -2,000 N

Is this right? Does the negative mean slowing down?

Am I even on the right path?

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# Homework Help: A question about Change in Momentum

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