Answered

7. Small rockets are used to make tiny adjustments in the speeds of satellites. One such rocket has a
thrust of 31 N. If it is fired to change the velocity of a 65000 kg spacecraft by 106 cm/s, how long should
it be fired?

Answer :

opudodennis

Answer:

222.3 s

Explanation:

From Newton’s law, F=ma hence [tex]a=\frac {F}{m}[/tex]

[tex]a=\frac {31}{65000}=0.000477[/tex]

Time, [tex]t=\frac {\triangle v}{acceleration}[/tex]

Where [tex]\triangle v[/tex] is change in velocity

The change in velocity is equivalent to 0.106 m/s

[tex]t=\frac {0.106}{0.000477}=222.2581[/tex]

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