Answer to Question #164658 in Physics for Tusuf

Question #164658

A car traveling at 20.0 m/s starts to decelerate at a constant rate. It comes to a stop in 7.5 seconds. What is the cars acceleration

Expert's answer

"a=\\dfrac{v-v_0}{t}=\\dfrac{0-20\\ \\dfrac{m}{s}}{7.5\\ s}=-2.67\\ \\dfrac{m}{s^2}."

The sign minus means that the car decelerates.

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