Question

A rocket launched into outer space travels 240000km during the 6.0 h after the launching. What is the average speed of the rocket in km/ h and m/s?

Answer 1

The average speed of rocket in km/h is 40000 km/h and in m/s is 11111 m/s.

Step-by-step explanation:

As the rocket is launched into outer space, the distance is given as 240000 km during 6 h. So the average speed will be the sum of initial speed and final speed.

As initially, the speed of rocket will be zero when it is at rest. And when it reaches the final speed, it had covered 240000 km in 6 hr.

So final speed is given by,

`\text { final speed }=\frac{\text {distance}}{\text {time}}=(240000)/(6)=40000 \mathrm{km} / \mathrm{hr}`

Thus the average speed will be same as the final speed since the initial speed and time is zero.

Average speed =40000 km/h.

In order to represent it in m/s, we get average speed =
`(40000*1000)/(3600) =11,111 m/s`

So the average speed of rocket in km/h is 40000 km/h and in m/s is 11111 m/s.