I had this question on a quiz, it was X.
The velocity of the spacecraft with respect to the Sun is
the velocity of the comet in the reference system of the spacecraft is
So, the velocity of the comet in the reference system of the Sun will be
And the negative sign tells us that the comet is directed toward the Sun.
Answer:
1. external force;not change
2. all of the above
Bonus!!!!!!
Can i have brainliest
Answer:
Explanation:
We want to write the equation of displacement (vertical in this case) for accelerated motion, which is . If we take the upward direction as positive, assume it starts from rest and from the ground, and (the units are wrong in the text, if accelerates at that magnitude, it's an acceleration, in particular in ), then we have .
We want to know the time when , so we need to solve , for which we have:
This means it takes 4 seconds for a rocket accelerating at to reach a height of 192m.