Mathematical and Physical Journal
for High Schools
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Problem P. 3974. (April 2007)

P. 3974. A body of mass m1=2 kg slides down from the top of an inclined plane (the angle of inclination is \alpha=20o.) A cart of mass m2=1 kg is attached to this body with a thread of length \ell=1.6 m as shown in the figure. The thread initially is straight. Along the first part of the slope, the length of which is \ell/2, friction is negligible, along the second part, the length of which is \ell/2, the coefficient of friction is \mu=0.6. How far will the two objects be when the cart reaches the pulley?

(4 pont)

Deadline expired on May 11, 2007.


116 students sent a solution.
4 points:67 students.
3 points:28 students.
2 points:6 students.
1 point:3 students.
0 point:2 students.
Unfair, not evaluated:10 solutions.

Problems in Physics of KöMaL, April 2007