Recent content by klm

please can someone help

A 5.0 kg, 60-cm-diameter disk rotates on an axle passing through one edge. The axle is parallel to the floor. The cylinder is held with the center of mass at the same height as the axle, then released. What is the cylinder's initial angular acceleration? ok so this is what i think i...

yes it is correct for the 20 kg mass

please can someone help!

i found the two forces acting on the 20 kg ball and then i just did the pythagorean theorem to find the hypotenuse which would be the resultant since they are perpendicular

edit- nevermind i figured it out

thank you fliinghier. i wasn't sure what the rules were and if you could just add things together like that. thank you for explaining!

i think i understand how to do it. thank you for all your help :)

no no sorry i am confusing you! you are right, the two objects are separate before and after the collision.

thank you moncheri. i did not think you were allowed to do this way because i thought you needed to keep the initial velocities separate from the final velocities. i am confused because how can you put the final velocity of b, with the initial velocity of a like you did. thank you for...

ok thank you for your help. i will go look for an example

i can't add the KE's b/c i don't know how to use the velocity in the equations. i know i need to use the final and initial, but my only problem is that i have 2 intials and 2 finals. and i don't know how to use that. i don't have a problem to solve, i am just asking because this is a concept i...

i don't know?

.5mv^2

yes i have 2 diff initial velocity for A and B and 2 diff final velocities for A and B