Question

2. How long would it take a car to reach 50 m/s if they accelerated at a constant rate of 5.44

m/s?? Assume the car begins at rest.

Answer 1

9.19 seconds (2dp)

Given:

v = 50m/s

u = 0 m/s

a = 5.44 m/s

t = ?

Substitute values into the equation v = u + at

v = u + at

50 = 0 + 5.44 x t

t = 50/5.44

t = 9.19 seconds

Time is in seconds as the velocity and acceleration are in metres per second instead of kilometres per hour