Question

a rocket is traveling at 10km/s. how long does it take rocket to travel 30km?
Give me answer in full details!

Answer 1

QUESTION:

A rocket is traveling at $10\mathrm{km/s}$. How long does it take rocket to travel $30\mathrm{km}$? Give me answer in full details!

SOLUTION:

The speed $\mathbf{u}$ of the rocket is the distance $\mathbf{d}$ traveled by the rocket divided by the duration of the interval $\mathbf{t}$:

$$u = \frac{d}{t}$$

Hence, the rocket takes

$$t = \frac{d}{v} = \frac{30\ \mathrm{km}}{10\ \mathrm{km/s}} = 3\ \mathrm{s}$$

to travel $30\ \mathrm{km}$.

ANSWER:

3 seconds