Recent content by Mecia22

Homework Statement I figured out the escape speed from the sun, and the speed the spaceship was already going. So how much energy would that velocity take?The Attempt at a Solution This is how I did it: E=(1/2mv(escape speed)^2-1/2m27777(current speed)^2)+Gm1m2/rSo did I do that right?

Oh sorry, I meant just from the sun.

Homework Statement I need to what the escape speed from the sun to mercury would be if the spaceship is 25 mil km away from the sun. Homework Equations The Attempt at a Solution Basically, all need to know is if I can do this: Gm1m2/radius of sun+ 25 mil km away from sun=1/2 mv^2...

xcsfa

Yikes... you're confusing me. I guess what I'm asking is what steps would I do to get to my final equation?Would it be Efinal=Ekinetic+change of Epotential ?

Okay, so then the equation would be E=EK+EP?

So you're saying I'd do: 10kg * 10 (gravity on Earth)=72.5a ??

dss Homework Statement In Rendezvous with Rama, they are on rung 700, so about 213 m down into the ship. The gravity is very small. It says that they weigh 10 kg in that gravity. So what gravity are they in? Homework Equations I know I use w=ma, but how do I get the 10 kg into N? I guessed...

Homework Statement -- This is out of Rendezvous With Rama by Arthur C. Clarke You know it is 907184 kg and is going 50,000 m/s So how much energy does it have right before it hits the earth? Homework Equations Do I use Fg= Gm1m2/r^2 ? Ek=1/2mv^2? I have ΔE=1/2mv^2 written down as an equation...