Q1. In the one-dimensional elastic collision a ball of mass 0.520 kg, moving with velocity 5.20 m/s, strikes an initially stationary ball of mass 0.810 kg. Find out the final velocity of the initially moving ball.
Q2. On a cello, the string with the largest linear density (1.54 10-2 kg/m) is C string. This string produces a fundamental frequency of 63.4 Hz and has the length of 0.795 m between the two fixed ends. Find tension in the string.