the National Natural Science Foundation ofChina (Grant No. 11132001)
In this paper, we experimentally and theoretically study the resistance force that develops when a cylinder with a flat face colliding against dry quartzite sand. Observations from experimental data clearly show that ...
supported by the National Natural Science Foundation of China (Grant No.11132001)
In this paper, we base a theory established in an impulse-energy level to solve a problem of a disk-bail system, in which a moving ball collides perpendicularly against an disk staying on a horizontal surface. The imp...