Recent content by Bekamop99

g= Thank you both for your responses. I've realized I read a few things wrong in the question in the first place so have had another look at it but am still 4 decimal places out! Attached is my working, see what you can make of it! But I really understand if you would rather not reply! :)

Thanks for this but I can't work out how to find Kinetic energy. I tried F(mg)=mv^2/r , finding v at max and min orbits. Then I added (Ep max orbit + Ek max orbit) - (Ep min orbit + Ek min orbit). But that's not right! I think I've got this really confused. I may just ask my teacher in a few...

Homework Statement Scientists are planning to launch a rocket from the surface of the Earth into an orbit at a distance of 18000 km above the centre of the Earth. The radius of the Earth is 6400 km and it has mass 6.0x10^24 kg. What is the minimum work done to move the 150kg mass of the rocket...