The figure represents a frictionless track where a 2.0 kg ball moves, starting from rest at A. Consider g = 10 m/s². Determine the speed of the
ball passing through point B.
A) 2. 3 m/s
B) 10.2 m/s
C) 13 m/s
D) 25 m/s
E) 68 m/s

On a horizontal frictionless surface, a small block with mass 0.200 kg has a collision with a block of mass 0.400 kg. immediately after the collision, the 0.200 kg block is moving at 12.0 m/s in the direction 30° north of east and the 0.400 kg block is moving at 11.2 m/s in the direction 53.1° south of east. use coordinates where the +x-axis is east and the +y-axis is north.(a) what is the total kinetic energy of the two blocks after the collision (in ) what is the x-component of the total momentum of the two blocks after the collision? (indicate the direction with the sign of your ) what is the y-component of the total momentum of the two blocks after the collision? (indicate the direction with the sign of your answer.)