Two blocks, with masses `m_(1) 2.5 kg` and `m_(2) = 14 kg`, approach each other along a horizontal, frictionless track, The initial velocities of the blocks are `v_(1) = 12.0 m//s` to the right an d`v_(2) = 3.4 m//s` to the left. The two blocks then collide and stick together. Which of the graph could represent the force of block `1` on block `2` during the collision ?
A.
B.
C.
D.
