As shown in the diagrams, a lump of clay travels horizontally to the right toward a block at rest on a frictionless surface. Upon collision, the clay and the block stick
together and move to the right.
Compared to the total momentum of the clay and the block before the collision, the
momentum of the clay-block system after the collision is-
A less
Block
Block
Clayr
B greater
Before Collision
After Collision
C the same
Dis doubled