Answer:

A = dV / dt

Or

A = (Vf - Vi) / (Tf -Ti)

A = ( 0 - 30 ) / 3 seconds

A = - 30 km/h / 3 s = - 10 km/h / s

Using only SI units,

A = - 10,000 m / 3,600 s / s = 2.778 m/s /s = - 2.778 m/s

Explanation:

corret me if im wrong

Answer:

If a car slows from 30km/h to rest in 3 seconds, what is its acceleration?

Convert the speed into m/s:

30/3.6 = 8.33m/s

Acceleration is equal to change in velocity divided by time:

a=(0–8.33)/(3)

Acceleration is equal to approximately -2.78m/s/s or 2.78m/s/s in the opposite direction to which the car was moving

hope its help