Homework Help: Dynamics Problem? - reason for the cases described

PhysicStud01 · Dec 13, 2014

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution
i cant figure out the reasons for the statements. could you explain, along with th e physics involved.
also, (a) and b(i). you are welcome to explain the numerical parts too.

SteamKing · Dec 13, 2014

PhysicStud01 said: ↑

i cant figure out the reasons for the statements. could you explain, along with th e physics involved.
also, (a) and b(i). you are welcome to explain the numerical parts too.

Apparently, it's some sort of HW problem or exam. Where's the rest of it?

PhysicStud01 · Dec 13, 2014

SteamKing said: ↑

Apparently, it's some sort of HW problem or exam. Where's the rest of it?

it's an exam question from very old paper - not recent. that's all there is to the question. could you help with explaining the cases and reasons

SteamKing · Dec 13, 2014

PhysicStud01 said: ↑

it's an exam question from very old paper - not recent. that's all there is to the question. could you help with explaining the cases and reasons

To me, these questions seem self-explanatory. If you have a specific question about something which is unclear, I'll try to help. But simply saying 'Explain this' is too vague.

PhysicStud01 · Dec 13, 2014

SteamKing said: ↑

To me, these questions seem self-explanatory. If you have a specific question about something which is unclear, I'll try to help. But simply saying 'Explain this' is too vague.

the 2 parts of (d). could you explain. like give the reason and what I should have known to arrive that the conclusion (reason)

SteamKing · Dec 13, 2014

PhysicStud01 said: ↑

the 2 parts of (d). could you explain. like give the reason and what I should have known to arrive that the conclusion (reason)

Well, what happens when you shoot something out of a gun? Study the details given in section (c) and ask yourself if it would be safe for a man inside the spacecraft to be shot out of a gun.

It takes a certain velocity to achieve orbit. By siting the gun on the equator, how does this help achieve that velocity? What does the earth do all day?

PhysicStud01 · Dec 14, 2014

SteamKing said: ↑

Well, what happens when you shoot something out of a gun? Study the details given in section (c) and ask yourself if it would be safe for a man inside the spacecraft to be shot out of a gun.

It takes a certain velocity to achieve orbit. By siting the gun on the equator, how does this help achieve that velocity? What does the earth do all day?

thanks a lot. but sorry, i still can't figure it out

could someone else plz help

haruspex · Dec 14, 2014

PhysicStud01 said: ↑

thanks a lot. but sorry, i still can't figure it out

could someone else plz help

(d)(i) Think about forces.
(d)(ii) The sun does not go around the earth each day, right?