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P. 4129. The bob of a simple pendulum is displaced and then released. What can be the greatest angle of displacement, if the maximum force exerted by the thread is twice the weight of the bob, and the thread is not to be broken?

(4 points)

Deadline expired on 11 February 2009.

Statistics on problem P. 4129.
 165 students sent a solution. 4 points: 142 students. 3 points: 2 students. 2 points: 10 students. 1 point: 4 students. 0 point: 2 students. Unfair, not evaluated: 5 solutions.

• Problems in Physics of KöMaL, January 2009

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