A car is initially traveling at 50.0 km/h. The brakes are applied and the car stops over a distance of 35 m. What was magnitude of the car's acceleration while it was braking? A)2.8 m/s² B)5.4 m/s² C)36 m/s² D)71 m/s² E)9.8 m/s²

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Quizplus · Accepted Answer

To find the acceleration, use the formula $ v^2 = u^2 + 2as $. Here, final velocity $ v = 0 $, initial velocity $ u = 50 $ km/h (convert to m/s by multiplying by $ \frac{5}{18} $), and distance $ s = 35 $ m. Solving for $ a $ gives approximately $ 2.8 $ m/s².

A Car Is Initially Traveling at 50