Recent content by skins266

Thanks for your help. I knew it was something like that.

Yeah, we get some pretty weird descriptions, but it makes it fun. So basically I add the two masses and then find the impusle of the puck hitting the octopus and then I multiply that by the two masses?

A 0.105 kg hockey puck, moving at 35.0 m/s, strikes a 0.240 kg octopus thrown onto the ice by a hockey fan. The puck and octopus slide off together. Find their velocity in m/s I really do not have a clue on what to do and how to do it.

i didn't know that, but where I am going off track here. Since my equation was right shouldn't I have the right answer? Or is it the units thing that I can't figure out?

so I just multiply my answer by the number in a)?

but which one is R, the radius of the Earth added to the radius where the spaceship is at, or what?

then it would be multiplied by two and squared

it would be by K

so, just in units, (m^3/kg/s^2)(kg)(?)/(km^2). So how do I convert m^3 to km? and what is the missing unit. Other than that I have the equation right?

Homework Statement The radius of the Earth is about 6.38E3 km. A 7.38E3 N spacecraft travels away from Earth. What is the weight of the spacecraft at the following disatnaces. a)6.38E3 km b)1.31E4 km Homework Equations F=GMeMship/r^2 The Attempt at a Solution but that...

Oh yeah, my bad. It is in km and so my radius would be 6.38E3 and then the answer would be 2642.68 ... which is right. Thanks for your help.

so r = Re(sqrt2) so r = 6.38E6*sqrt2. Which then equals 9022682.528, but when I punch that number into WebAssign it is wrong, so is it not in km, or what

So I will get 1/Re^2 = 2/r^2 and then r = Re - x where x is the distance to the rocket? But then I get lost on applying it to the question.

Homework Statement How high does a rocket have to go above Earth's surfae before its weight is half what it would be on earth Homework Equations F=GMeMr/r^2, however there are too many variables here to use The Attempt at a Solution F/2=GMeMr/((sq root 2)r))^2, but I don;t know...