Question

If a bust starts to move and its velocity becomes 90 km after 8 seconds . calculate its acceleration answer it quick please

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Answer 1

a = 3.125 [m/s^2]

Step-by-step explanation:

In order to solve this problem, we must use the following equation of kinematics. But first, we have to convert the speed of 90 [km/h] to meters per second.

`90(km)/(h)*(1000m)/(1km)*(1h)/(3600s) \\= 25 (m)/(s)`

`v_(f) =v_(i) + (a*t)`

where:

Vf = final velocity = 25 [m/s]

Vi = initial velocity = 0

a = acceleration [m/s^2]

t = time = 8 [s]

The initial speed is zero as the bus starts to koverse from rest. The positive sign of the equation means that the bus increases its speed.

25 = 0 + a*8

a = 3.125 [m/s^2]