Question

Once your rocket reaches space, the captain adjusts the speed. your captain goes from 24,000 km/hr to 17,000 km/hr over 90 seconds. what is your acceleration?

Answer 1

Answer:

-21.6 m/s^2

Explanation:

First of all, we need to convert the initial and final velocities into m/s:

$u = 24,000 km/h = 6666.7 m/s$ is the initial velocity

$v=17,000 km/h =4722.2 m/s$ is the final velocity

The acceleration is given by

$a=\frac{v-u}{t}$

where

t = 90 s is the time elapsed

Substituting the numbers, we find

$a=\frac{4722.2 m/s-6666.7 m/s}{90 s}=-21.6 m/s^2$

and the negative sign means the rocket is decelerating.