A certain car is capable of accelerating at a rate of + 0.30 m/s2. How long does it take for this car to go from a speed of 55 mi/h to a speed of 80 mi/h?

Answer 1

Vf - Vo = 80 - 55 = 25mi/h.

25mi/h * 1600m/mi * (1/3600h/s =11.11m/s.

a = (Vf - Vo) / t = 0.30m/s^2,
(11.11) / t = 0.30,
0.3t = 11.11,
t = 37s.