William W. answered • 05/13/19

Math and science made easy - learn from a retired engineer

v = v_{i} + at

Initial velocity (v_{i}) = 25

a = -2.3

t = 1.5

So v = 25 + (-2.3)(1.5) = 25 - 3.45 = 21.55 m/s

John J.

asked • 05/13/19A driver moving at 25 m/s applies his brakes for 1.5 seconds causing a deceleration of 2.3 m/s2. (Hint: deceleration is just negative acceleration; the sign is important to your calculation.)

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William W. answered • 05/13/19

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Math and science made easy - learn from a retired engineer

v = v_{i} + at

Initial velocity (v_{i}) = 25

a = -2.3

t = 1.5

So v = 25 + (-2.3)(1.5) = 25 - 3.45 = 21.55 m/s

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