Saturday
April 19, 2014

Homework Help: physics

Posted by JIll on Sunday, September 1, 2013 at 8:17pm.

You are driving a car 35mi/h down the road. The stoplight in front of you suddenly turns red and you slam on the brakes, skidding to a halt. You get out of the car and measure the skid marks made by your tires to be 28.5m meters. (Assume positive x to be in the forward direction).
A:What is the velocity of the car in meters per second?
B:What is the acceleration of the car?
C:If your car were going twice the velocity, how far would it take to stop if the acceleration were the same as for part (B)?
D:How long would it take the car to stop if it were going at twice the velocity?

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