Problem P. 4077. (May 2008)
P. 4077. A 60g and an 80g ball are fixed to the ends of a 28cm rod of negligible mass. The rod is balanced by a pivot such that it is horizontal and stays at rest. With what angular acceleration does it start to move, if the pivot is placed 2 cm closer to the heavier ball?
(4 pont)
Deadline expired on 11 June 2008.
Statistics:
92 students sent a solution.  
4 points:  58 students. 
3 points:  20 students. 
2 points:  9 students. 
1 point:  5 students. 
