Question

Car accelerates from 36 km/h to 54 km/h in 10 sec find accleration and distance travelled by car

Answer 1

Initial velocity u = 36 km/h = 36 x 1000/3600 m/s = 10 m/s
Final velocity v = 54 km/h = 54 x 1000/3600 m/s = 15 m/s
Time t = 10 s
Acceleration a = (v - u)/t = (15 - 10)/10 = 5/10 = 0.5 m/s2.

Distance travelled  S = ut + ½ at2
                                     = 10 x 10 + ½ x 0.5 x 10 x 10     m
                                     = 100 + 25 = 125 m