Homework Statement
Imagine a universe that consists of nothing but two planets of unequal mass. The large planet has a large negative charge and the smaller planet has a large (but different) positive charge. Suppose that at some time these two planets collide. Will momentum be conserved...
Homework Statement
We know that momentum is supposed to be conserved in this collision. We observe, however, that the pucks eventually come to a stop, at which point they have zero momentum. Give a solid explanation (using the law of conservation of momentum) for this apparent violation of the...
Homework Statement
http://img147.imageshack.us/img147/7830/scan0001ym3.png
The Attempt at a Solution
A)
i think force of Tension ...
C)
Normal Force
Plz help me