Answer:
1 unit
Step-by-step explanation:
Given that,
A piece of putty moving with 1 unit of momentum strikes and sticks to a heavy bowling ball that is initially at rest.
According to the law of conservation of linear momentum, for an isolated system, the net momentum of the system remains conserved.
Here, momentum before the collision = 1 unit
It would mean that momentum after the putty sticks to the ball, the combined momentum will be equal to 1 unit.