Question

What constant acceleration is required to increase the speed of a car from 30 miyh to 50 miyh in 5 seconds?

Answer 1

The acceleration is 1.8 m/s^2.

Explanation:

initial velocity, u = 30 mph = 13.4 m/s

Final velocity, v = 50 mph = 22.4 m/s

time, t = 5 s

Let the acceleration is a.

Use first equation of motion

v = u + at

22.4 = 13.4 + 5 a

a = 1.8 m/s^2