The maker of an automobile advertises that it takes 7 seconds to accelerate from 20 kilometers per hour to 90 kilometers per hour.Assuming constant acceleration,compute the acceleration in meters per second per second.Round your answer to three decimal places. A)1.944 m/sec² B)4.365 m/sec² C)6.250 m/sec² D)3.056 m/sec² E)2.778 m/sec²

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Quizplus · Accepted Answer

To find the acceleration, convert the speeds from km/h to m/s: 20 km/h = 5.556 m/s and 90 km/h = 25 m/s. Use the formula a = (v - u) / t, where v = 25 m/s, u = 5.556 m/s, and t = 7 s. The acceleration is (25 - 5.556) / 7 = 2.778 m/s².

The Maker of an Automobile Advertises That It Takes 7