- #1
babbagee
- 74
- 0
Ok here is the problem
A ball with mass M moving horizontally at 5.00 m/s, collides elastically with a block with mass 3M that is initially hanging at rest from the ceiling on the end of a 50.0-cm wire.
Find the maximum angle through which the block swings after it is hit.
Ok what i tried was to see what the velocity of the two objects was when the first object hits the second one.
Mv1i + 3Mv2i = (4M)vf
the velocity of the hanging object is going to be zero so that whole term cancels out.
i used this equation to find the final velocity, then i used the kenetic energy theorem
.5Mv2 + 3Mgh = 4Mgh to solve for the height that the object swings up. But then i get stuck, because i think its asking me for the angle that the string makes when its at the maximum arc. Am I doing this the right way, if not can someone point me in the right direction.
Thanks
A ball with mass M moving horizontally at 5.00 m/s, collides elastically with a block with mass 3M that is initially hanging at rest from the ceiling on the end of a 50.0-cm wire.
Find the maximum angle through which the block swings after it is hit.
Ok what i tried was to see what the velocity of the two objects was when the first object hits the second one.
Mv1i + 3Mv2i = (4M)vf
the velocity of the hanging object is going to be zero so that whole term cancels out.
i used this equation to find the final velocity, then i used the kenetic energy theorem
.5Mv2 + 3Mgh = 4Mgh to solve for the height that the object swings up. But then i get stuck, because i think its asking me for the angle that the string makes when its at the maximum arc. Am I doing this the right way, if not can someone point me in the right direction.
Thanks