A space craft flying in a straight course with velocity 75 kms-1 fires its rocket motors for 6.0 s. At the end of this time its speed is 120 kms-1 in the same direction find: (i) the average acceleration of the space craft while the motors were firing (ii) the distance traveled by the space craft in the first 10 s after the rocket motors were started, the motors having been in action for only 6.0 s.
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Explanation:
HEY MATE .........
Given ;
The initial velocity (u) is =75km/s
final velocity=120km/s
time taken : 6 sec
(I) acceleration=(final velocity- initial velocity)/time taken
=[(120-75)/6]kms-2
=(45/6) kms-2
=7.5kms-2
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