Question

a spaceship travelling in space aatv 400 km/s fires its engine for 10 seconds so that its final velocity becomes 600 km/s find the total distance traveleed by it in 60 seconds after firing

Answer 1

distance travelled in the first 10 seconds, =  avg velocity * time

     s1 = (50+60)/2 km/s * 10 sec  = 550 km

distance travelled inthe next 20 sec =  60 km/s * 20 s = 1, 200 km

so total distance in 30 sec. = 1, 750 km

Answer 2

Explanation:

after firing...

distance travelled by the space ship in 1 sec - 600km

distance travelled by the spaceship in 60 sec - 600×60 km =36000km

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