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## Homework Statement

A spring of negligible mass

and force constant k = 400 N/m is hung vertically, and a 0.200-kg

pan is suspended from its lower end. A butcher drops a 2.2-kg

steak onto the pan from a height of 0.40 m. The steak makes a

totally inelastic collision with the pan and sets the system into ver-

tical SlIM. What are (a) the speed of the pan and steak immedi-

ately after the collision;

## Homework Equations

P = Mv

## The Attempt at a Solution

I cant really see how linear momentum can be conserved in this case. Doesnt the weight of the steak constitue a net external force on the system? How then can momentum be conserved? I can do the rest of the problem if i clarify this doubt. Thanks