(adsbygoogle = window.adsbygoogle || []).push({}); Due in an HOUR!!! Early Physics problem.. relating drag, weight, and speed.

1. The problem statement, all variables and given/known data

A 1.74 m wide, 1.48 m high, 1500 kg car hits a very slick patch of ice while going 21.0 m/s. Air resistance is not negligible. If friction is neglected, how long will it take until the car's speed drops to 18.0 m/s?

2. Relevant equations

I think this one would be useful:

final velocity = initial velocity + acceleration x change in time

3. The attempt at a solution

My attempts are WAAYY off. I have two pages of work done and an hour of my time and nothing to show for it. I tried to calculate drag as part of the acceleration = net force / mass equation, but I don't know if that was right. Please hurry! It was the last question on my online set of homework due in an hour.

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# Homework Help: Due in an HOUR Early Physics problem relating drag, weight, and speed.

**Physics Forums | Science Articles, Homework Help, Discussion**