Question

A space craft flying in a straight course with a velocity 75km/h fires it rocket motors for 6s. At the end of this time it's speed is 120km/s in the same direction. Find 1) The space crafts average acceleration while motors were firing 2) The distance travelled by the space craft in the first 10s after the rocket motors were started the motors having been in action for only 6s.

Answer 1

Answer:

avg acceleration is 7.5

Explanation:

we have two velocities 75 km per hour and the other is 120 kilometres per hour

use this to calculate the average acceleration which is change in velocity over change in time

therefore the average acceleration comes out to be 7.5