Answer to Question #14327 in Mechanics | Relativity for Annette

Question

A car accelerates from rest at a constant rate of 2 m/s2 for 5 s. a) What is the speed of the car at the end of that time? b) How far does the car travel in this time?

Answer 1

a)
The equation for the speed is:
V(t) = V0 + a * t = a * t, as V0 =
0.
Then V(5) = 2 * 5 = 10 m/s.

b)
The equation for the covered
distance is:
S = V0 * t + a * t^2 / 2 = a * t^2 / 2, as V0 = 0.
Then S = 2
* 5^2 / 2 = 25 m.