Question

What can you do to stop an objects momentum

Answer 1

Momentum=(mass)*(velocity)

momentum depends on mass and velocity

for non relativistic particles(speed of object is very small compared to light) mass will not change with time,so it is constant and if we try to decrease velocity to zero then momentum will be zero.

for relativistis particles(speed is object nearly equal to light)mass will change with time but it also depends on velocity. So if u try to reduce the velocity of an object then momentum is also reduced