Question

A car with a crashtest dummy inside travels at 40.23 m/s (90 mph) toward a stone wall during a crash test. When it strikes the wall, the car takes 0.70 s to stop. Calculate the deceleration of the car.

Answer 1

Answer:

The answer is  $-57.47m/s^{2}$

Explanation:

In the question we are  to solve for the deceleration  of the car on impact.

Given data

$speed= 40.23m/s$

$time$ =$0.70second$

To determine the deceleration  we apply,

$acceleration = \frac{speed}{time} \\\\acceleration= \frac{40.23}{0.7}$

$acceleration = -57.47m/s^{2}$