Answer: 9kgm/s
Step-by-step explanation:
momentum is the product of the mass of a body and its velocity.
laws of momentum states that the total momentum before collision is equal to momentum after collision or
Total momentum of a body is conserved. There can be elastic collision and inelastic collision.
A collision is said to be elastic if the bodies do not steak together after collision. Its inelastic if they steak together after collision.
In this case, the body is not in collision with any body.
From the question
M=3kg
V=3m/s
so
Mv=momentum
3kg *3m/s
9kgm/s