Recent content by elDuderino81

Hi, sorry about the typo, i should have wrote (4/3)∏r^3 In regards to units of density, again that was a typo and should read 3*10^3 kg M^-3, which is what has been provided in the problem set.

The enclosed volume of a perfect sphere is is V=(3/4)∏*r3, and when rearranging the previous equation I get r=GM/0.5Ve^2 and M=G/0.5V^2*r? I'm still struggling to see what I can do with this, as it appears that to find r I need M and to find M I need r? I'm really confused :-(

[b]1. "Calculate the radius of a planet with mean density of 3.0x10^3 m2kg-3, from which a golf ball can be thrown to infinity as a velocity of 40 ms-1" Homework Equations I've been looking at the equation of: Vesc=sqroot of 2*G*M/r and rearranging to r=2*G*M/Vesc. However, the...

Thank you Doc Al and SteamKing for prompting me in the right direction, very much appreciated! :-)

wouldn't it normally be the perpendicular component of MgXsinθ? This is what confused me initially. If it was a standard freebody diagram on a horizontal plain, the reaction force would be equal to Mass*Gravity (R=mg). . The total energy is conserved as a gain in kinetic energy through a...

Hmm, ok. So kinetic energy is conserved, so: V^2=U^2+2as → 0+2*10ms'1*50m=1000ms-1 Velocity will be sqroot = 31.62ms-1?

[b]1. A Level Physics - finding resultant velocity at bottom of a frictionless incline, with no angle provided? [b]2. Hi, I am currently working through a problem set and I'm being asked to find the speed of a cart (roller-coaster) after it has traveled down a slope (from points A to B). The...