Acar with mass 450 kg has a kinetic energy of 16,256 j. what is the speed of the car?

Explanation:

It is given that,

Initial velocity of the car, u = 48.5 km/h = 13.47 m/s

Final velocity of the car, v = 80.2 km/h = 22.27 m/s

Time, t = 3.6 s

(a) Average acceleration is given by :

(b) We need to find the final velocity after 4 seconds. From first equation of motion as :

v = u + a t

v = 32.07 m/s

or

v = 115.45 km/h

Hence, this is the required solution.