Recent content by Port

Electric Forces Problem need help! ok i need to kno how to add all the forces acting on charged particles. these particles are in a square + . - . -. - . for instance i solved for all the forces acting on the + particle but i don't know how to add the three since it adds one...

but when i do that i get 1.172 for an answer but it says in my book that the answer is 1.1x10^-4J?

ok i have a problem with a 0.005kg coin that has an initial velocity of 25cm/s that hits a 0.015kg coin that is at rest. atfer the collision the 0.005kg coin has a velocity of -12.5cm/s. What i have to find is the Kinetic energy transferred was. i got the final velocity for the 0.015kg coin...

but if i use the same formula with the different masses they cancel out anyway don't they??

ok i got up to this part and i am stuck: KEi+PEi=KEf+PEf 0J+mgh=1/2mv^2+0J h=5cos30 h=4.3m v=6.5m/s so now what do i do? where do i do this for next and how do i apply it to MEi=MEf? i am very confused!?

i kinda also need help on another problem. i can't even start this problem because i have no idea how! can someone please tell me how? Tarzan and Jane, whose total mass is 130kg, start their swing on a 5m long vine when the vine is at an angle of 30 degrees with the horizontal. At the bottom...

thx that did work! Now could u help me on my other post please :biggrin:

so are u saying i should subtract what i get from the cos/sin from the 30?

i tried using 30cos37 but that doesn't work so then i tried using 30sin37 and that doesn't work either so i wonder if i am doing something wrong

i did start it i used the equation 1/2mv^2=mgh but then since their is an angle i tried to do it that way but i got the wrong answer. i don't5 expect anyone to do my homework or else it would be useless to do.

i kinda also need help on another problem. i can't even start this problem because i have no idea how! can someone please tell me how? Tarzan and Jane, whose total mass is 130kg, start their swing on a 5m long vine when the vine is at an angle of 30 degrees with the horizontal. At the bottom...

i started to do this engery problem we got for homework but when i tried to solve it i got the wrong answer. could someone please tell me how to begin this problem? Tarzan swings on a 30m long vine initially inclined at an angle of 37 degree with the vertical. What is his speed at the bottom...

omg i love u thanks so much! (its a gratitute type love ok!)

wait could u explain how u got that please??

wait what? how do i add or subtract gravity?