Question

If a test cars constant velocity is 90 km hr west what is the acceleration?

Answer 1

We define Velocity as the rate of change of distance. dS/dt.

Acceleration is defined as the rate of change of velocity, so dV/dt.

Here change in velocity is constant. So there is no acceleration.

v = u + at

a = (v-u)/t

Since v = u => a = 0 m/s^2