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serg [7]
2 years ago
9

A 3000-kg spaceship is moving away from a space station at a constant speed of 3 m/s. The astronaut in the spaceship decides to

return to the space station by switching on engines that expel fuel so that the sum of the forces exerted on the spaceship by the expelled fuel points toward the space station. What is the magnitude of the minimum force needed to bring the spaceship back to the space station
Physics
1 answer:
victus00 [196]2 years ago
4 0

Answer:

P = m (v2 - v1)     change in momentum

P = - m v1  if v2 is to be zero

F = P / t     change in momentum equals applied force

F = m a = - m v1 / t

a = -v1 / t     or a * t = -v1`

Any combination of a and t that is greater than v1 will bring the space station to a halt

If a is small then t must be large

Any applied force will eventually bring the ship to a halt and then begin the acceleration towards the starting point

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2 years ago
If two proton approach each other with speed of 400m\s and 450m\s respectively what is the total momentum of the two particle sy
lilavasa [31]

Answer: 83.65\times 10^{-27}\ kg.m/s

Explanation:

Given

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Mass of the Proton is m=1.673\times 10^{-27}\ kg

Since they travel in the opposite direction, therefore, their momentum cancels out each other.

Momentum is the product of mass and velocity

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7 0
2 years ago
A tennis ball is beaten downward with an initial speed of 5 m/s.
Anastasy [175]

Answer:

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Explanation:

Step one:

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Required:

the final velocity v

Step two:

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