Homework Help: Physical Science

Posted by Sheryl on Saturday, September 3, 2011 at 2:39pm.

The brakes of a care are applied to give it an acceleration of -3m/s^2. The car comes to a stop in 5 s. What was its speed when the brakes were applied?

Physical Science - Henry, Sunday, September 4, 2011 at 9:22pm
Vf = Vo + at = 0,
Vo = -at = - (-3)*5 = 15m/s.

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