Question

$\\ A \: space \: craft \: flying \: in \: a \: straight \: course \: with \: a \: velocity \: of \: \ \textless \ br /\ \textgreater \ 75 km s \: fires \: it's \: rocket \: motors \: for \: 6.0 s \: . \: At \: the \: end \: of \: this \: time , \: it's \: speed \: is \: 120 \: km s \: in \: the \: same \: direction. \\ Find : \\ \ \textless \ br /\ \textgreater \ (i) the \: space \: craft's \: average \: acceleration \: while \: the \: motors \: were \: firing, \\ \ \textless \ br /\ \textgreater \ (ii) \: the \: distance \: travelled \: by \: the \: space \: craft's \: in \: the \: first \: 10 s \: after \: the \: rocket \: motors \: were \: started, \: the \: motors \: having \: been \: in \: action \: for \: only \: 6.0s \: .$
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Answer 1

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• A spacecraft flying in a straight course with velocity of 75 km/s fires its rocket motors for 6.0s. At the end of this time its velocity becomes 120 km/s . Find the distance travelled by the spacecraft in the first 10 s after the motors were started,the motors being in action for only 6.0s.

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Answer 2

Explanation:

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