Question

A car is travelling at 25m/s. The driver takes his foot off the accelerator and slows down. His decceleration is two metres per second squared. How long does it take him to reach speed of fifteen metres per second squared?

Answer 1

V = Vo + a*t = 15 m/s, Vo = 25 m/s, a = -2 m/s^2, t = ?.