55. In the central elastic collision moving body mass m1 hits the stationary body weight m2, bringing the speed of the first body is reduced by 2 times. To determine: 1) the number of times the body weight of the first mass of the second body; 2) kinetic energy T2 of the second body immediately after the impact, if the initial kinetic energy of the T1 is the first body 800 J.

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)