Question

A car traveling at 26.4 m/s skids to a stop in 2.4 s. Determine the acceleration of the car.

Answer 1

`-11 m/s^2`

Step-by-step explanation:

The motion of the car is a uniformly accelerated motion, so we can find the acceleration by using the suvat equation:

`v=u+at`

where

v is the final velocity

u is the initial velocity

a is the acceleration

t is the time

For the car in this problem:

u = 26.4 m/s

v = 0 (the car comes to a stop)

t = 2.4 s

Solving for a, we find the acceleration:

`a=(0-26.4)/(2.4)=-11 m/s^2`

And the negative sign means the acceleration is opposite to the direction of motion.