Question

as a drivers vehicle approaches an intersection at 20 m/s the driver applies the brakes in order to stop creating a uniform acceleration of 2.3 m² calculate the time required to stop

Answer 1

8.70 seconds.

Step-by-step explanation:

1. Use the kinematic equation: v = u + at,

v = final velocity

u = initial velocity

a = acceleration

t = time.

Find variables and numbers:

v = ?

u = 20 m/s

a = -2.3 m²

v = 0 m/s

Rearrange values: t = (v - u) / a.

Plugging in the values: t = (0 - 20) / (-2.3) = 20 / 2.3