Two particles, m1 = 2m and m2 = m, are suspended on massless cords of the same length l = 1.00 m so that they touch each other (see Fig. below). Particle 1 is displaced to an angle of 30o with the vertical and let go. After the particles collide, the cord attached to particle 2 comes to a maximum angle of 45o.
Find the speed of mass m1 before the collision.
Find the speed of mass m1 and m2 after the collision.
Find the relative change of kinetic energy during the collision (DK/Ki).