Question

A car slow down from a speed of 72km/hr to rest in 25 second. what is the acceleration of the car​

Answer 1

Answer:

Acceleration =  - 0.8 m/s^2

Explanation:

Initial velocity (u) = 72 km/hr = 20 m/s

Final Velocity (v) = 0 (It comes to rest)

Time Period (t) = 25 s

Acceleration = (v - u)/t

                     =  (0 - 20)/25

                     =  -20/25   =   - 0.8 m/s^2