Recent content by physicsgirl101

is one of the equations set up T-(M+m)g = ...(that's G + N, right?) because (M+m)g is negative... ?

YAY! I did it on my own using what you had said about setting energies in different positions equal and I got the same answer as yoU! thanks.

For your equation for the second law of dynamics... is it basically saying the sum of the forces equals mass x (radial)acceleration which is also equal, in this case, to Tension minus Fg (minus because Fg is negative). .. ? So you set them equal... (?)

Thanks, I'll let you know if i get the right answer when I do it out----THANKS!

Thanks... but it's still a little complicated because I've never used those formulas before... how did you get the law of energy conservation equation?

Alright, now that ya'll have come to a consensus, can you make it understandable to me? (because I'm so confused after hearing everyone's different comments I don't know what is right anymore). Basically, when I've dealt with pendulums, I've only dealt with radial acceleration in the form...

there was another part of the question which asks the distance between the two spots of initial impact on the ground (cube and ball)... if anyone cares to do it... i got 4.178 meters-----anyways, I am glad to be done, thanks for all the clarifications!

Yay! I'm so excited, thank you, everyone!

Alright... After a lot of work, this is what I got: immediately after the collision: speed of ball: 2.4m/s speed of cube: 2m/s (going to the right---the same direction as the ball*) I then gathered that 153.6 Joules of kinetic energy was lost in the collision... How does that all sound...

i've never heard of centrifugal OR centripetal forces!

i've seen radial acceleration = v^2/r... so yes, i guess, because that's just subbing a = v^2/r into f=ma right? so yes, we've done some circular motion stuff... but just using that equation

Again, I've never heard the word "centripetal force"----so unless there's another name for it that my professor has used and I'm just not making the connection, I doubt he would give us a problem involving it... ?

Thanks, definitely keep me posted, Thanks!

First... there is obviously major disagreement betweek dextercioby and apchemstudent, so does a third party want to give an opinion? Second... My professor has never even mentioned the word "centrifugal force"----so unless there's another name for it that my professor has used and I'm just...

Thank you so much, APchemstudent! i can't believe i didnt catch that... i think I am in overload... :) THANKS!