The chart show the masses and velocities of two colliding objects that stick together after a collision.

A 3-column table with 2 rows. The first column labeled Object has entries A, B. The second column labeled Mass (kilograms) has entries 200, 150. The third column labeled Velocity (meters per second) has entries 15, negative 10).
According to the law of conservation of momentum, the momentum of the object after the collision is kg • m/s.

Explanation:

First, arrange the information in a table:

Object        Mass (kg)           Velocity (m/s)

  A                    200                      15

  B                     150                    - 10

After the collision, the two objects are stick together, thus you talk aobut one object and one momentum.

According to the law of convervation of momentum, the momentum after the collision is equal to the momentum before the collision.

Momentum before the collision, P₁:

Momentum after the collision:

the bal will not change its velocity.