Question

If a rocket-powered sled is accelerated to a speed of 440 m/s in 2.20 seconds, then what is the acceleration?

Answer 1

Answer:

$200 m/s^2$

Explanation:

The acceleration of an object is calculated as

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

where

v is the final velocity

u is the initial velocity

t is the time taken for the velocity to change from u to v

For the rocket in this problem:

u = 0 (it starts from rest)

v = 440 m/s is the final velocity

t = 2.20 is the time taken

Substituting,

$a=\frac{440-0}{2.20}=200 m/s^2$