Mathematical and Physical Journal
for High Schools
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Problem P. 4056. (March 2008)

P. 4056. An object of mass m is projected vertically up with a speed of v0. At the same moment another object of mass M, which is initially above the projected one, is dropped from a height of h. The two pointlike objects collide totally inelastically, and they stick to each other.

With what speed will they hit the ground?

(Data: m=1.25 kg, v0=19 m/s, M=2 kg, h=20 m.)

(4 pont)

Deadline expired on April 11, 2008.


176 students sent a solution.
4 points:107 students.
3 points:33 students.
2 points:23 students.
1 point:4 students.
0 point:1 student.
Unfair, not evaluated:8 solutions.

Problems in Physics of KöMaL, March 2008