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Monday, September 14, 2015

Finding the acceleration of a car

Initially, the car travels along a straight road with a speed of 38 m/s

If the brakes are applied and the speed of the car is reduced to 12 m/s in 16 s , determine the constant deceleration of the car. Express your answer to three significant figures and include the appropriate units. Assume a is negative if it acts in the opposite sense to the positive velocity.

V0=38 m/s
V=12 m/s
t=16 s
a = ?

V=V0 + a*t
12 = 38 +a*16
a = (12 - 38)/16
a = -1.63 m/s2

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