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Determine the Acceleration of a Car

The definition of acceleration
Acceleration is the rate of change of velocity as a function of time.

For example a car traveling at 50 km/hr starts to accelerate, 10 seconds after, its speed changes to 100 km/hr then the acceleration of the car during the time can be calculated as below:

initial speed = 50 km/hr
final speed = 100 km/hr
the change of speed = 100 - 50 = 50km/hr
time = 10 seconds = 1/360 hr

thus the acceleration = (50km/hr) / (1/360 hr) = 18000 km/ hour2 = 1.38 m/ s2

the formula I am using here is: a = (v2 - v1)/t
where,
a: acceleration
v1: initial speed
v2: final speed
t: time

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