# Physics homework

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#1
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1 year ago
#2
think about newtons third law of motion and how the jetpack expels water out.
Last edited by localmemelord; 1 year ago
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#3
(Original post by localmemelord)
think about newtons third law of motion and how the jetpack expels water out.
There is an equal force of water going up as there is when the water is being forced down. Also the forces exerted are equal and opposite and tbe jetpack would accelerate up due to the same sized forces.
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#4
Hello?
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1 year ago
#5
(Original post by Marcusmaths)
There is an equal force of water going up as there is when the water is being forced down. Also the forces exerted are equal and opposite and tbe jetpack would accelerate up due to the same sized forces.
include how the equilibrium reached.
check mark scheme
Last edited by localmemelord; 1 year ago
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#6
(Original post by localmemelord)
include how the equilibrium reached.
check mark scheme
How many marks would i get out of 3 for this?
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#7
Can you also check my homework question on the thread physics homework.
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1 year ago
#8
(Original post by Marcusmaths)
How many marks would i get out of 3 for this?
defo 3
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#9
(Original post by localmemelord)
defo 3
Thanks for the help.
1
1 year ago
#10
(Original post by Marcusmaths)
Thanks for the help.
no problem
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1 year ago
#11
I would assume that you have looked into the mark scheme (ms) for this question. You may want to look into this physics StackExchange thread where the people discuss the “real physics” behind jetpack.
https://physics.stackexchange.com/qu...-jet-pack-work

I have a feeling that the mechanism behind jetpack is similar to backward reaction force on U-shaped hose. There have been a few misconceptions on the backward reaction force on a hose.
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