What exactly is pulling the man up/down in rocket?

  • Thread starter Benjamin_harsh
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In summary, the force from the floor or lift pushing the man up is what is pulling him down in the rocket. In the accelerating frame of reference of the rocket, there is also a fictitious force pressing the man down. However, in the inertial non-accelerating frame of reference of the ground, the force from the floor accelerates the person and due to Newton's 3rd law, the person exerts an opposite and equal force to the floor. This explains why the man feels thrusting in both directions while traveling in the rocket.
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Benjamin_harsh
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Homework Statement
What exactly pulling the man up/down in rocket?
Relevant Equations
What exactly pulling the man up/down in rocket?
Suppose man is traveling in a rocket. if rocket goes up, man feels someone thrusting him down, vice versa.

What exactly pulling the man up/down in rocket?
 
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  • #2
Floor of rocket or lift pushes him up.
 
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  • #3
There are two answers in your question depending in which frame of reference we ll answer.
  1. In the accelerating frame of reference of the rocket, there is a fictitious force that presses the man down. Maybe its not the right time to be introduced to fictitious forces but you can google about them and read the article on wikipedia. https://en.wikipedia.org/wiki/Fictitious_force
  2. In the inertial non accelerating frame of reference of the ground there is the force from the floor that accelerates the person. Hence due to Newton's 3rd law the person exerts an opposite and equal force to the floor.
 
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  • #4
Benjamin_harsh said:
Homework Statement:: What exactly pulling the man up/down in rocket?
Relevant Equations:: What exactly pulling the man up/down in rocket?

Suppose man is traveling in a rocket. if rocket goes up, man feels someone thrusting him down, vice versa.

What exactly pulling the man up/down in rocket?
If there was a hole in the bottom of the rocket, the rocket would go up without the man. He'd be left on the ground.
 
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  • #5
@PeroK post #4 might seem funny but he says a lot, its the force from the floor/seat that is responsible for this effect. Forget my post about fictitious forces.
 
  • #6
The gravitational force on the pilot and the force from the seat and seatbelt are the only relevant forces here. But you feel the thrust even when accelerating somewhere in space where there's no more gravitational force to any particular direction.
 

1. What is the force that pulls the man up in a rocket?

The force that pulls the man up in a rocket is the thrust generated by the rocket engines. This thrust is created by the combustion of fuel and the resulting hot gases being expelled out of the back of the rocket.

2. How does the rocket overcome the force of gravity?

The rocket overcomes the force of gravity by generating enough thrust to create an upward force that is greater than the force of gravity pulling the rocket down. This allows the rocket to lift off the ground and enter into space.

3. Is there any other force involved in the movement of a rocket?

Yes, in addition to the thrust generated by the rocket engines, there are other forces at play. These include air resistance, which can slow down the rocket's ascent, and the force of gravity from other celestial bodies, such as the Earth or the Moon.

4. How does the man stay in the rocket while it is moving?

The man stays in the rocket due to the force of inertia. This is the tendency of an object to resist changes in its motion. As the rocket accelerates upwards, the man's body wants to stay in its current state of rest, and so he remains inside the rocket.

5. What happens to the man's weight as the rocket moves higher?

The man's weight decreases as the rocket moves higher. This is because the force of gravity decreases with distance from the Earth's surface. However, the man's mass remains the same, so his weight will only decrease if the force of gravity is also decreasing.

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