Recent content by c_m

you mean like, V = G m1 m2 / r? rather than V = Gm/r?

Thankyou for relpying I have actually sent my work now but i did not really do this one, so i would still like to go through it to see what i should have done. So i do need equation A then? but not B. do i need to find another expression now then for the potential? I just didnt know where...

Iv got it now! thankyou very much you were a great help!

Homework Statement In a system where other gravitational influences can be discounted, two particles of equall mass m, are fixed at positions x= 0 and x= x0 on the x-axis. 1) derive an expression for the gravitational potential Vgrav at a general position x on the x-axis.? Homework...

Well isn't the magnitude of F, F=ma? ...wish my brain would wake up!

Wow! i suprised myself there! wouldnt the force be perpendicular to u and b?

ok, i have given it one last attempt before my brain gives up, i now have, E = qu x B / q x F am i right? or closer to been right?

Thankyou for replying, yea that's what I am trying to, any chance you could give me a little push in the right direction as to where i have gone wrong? because i figured that where i made a mistake but i can't see how to correct it?

Homework Statement Ok here it goes... A stream of electrons, each with speed u = 5.9 x 10^6 m s^-1 and traveling along the x-axis in the positive x-direction enters a region pervaded by a uniform magnitic field B. The electrons the describe a circle with raidus R in the horizontal xy-plane...