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**1. The problem statement, all variables and given/known data**

What is the smallest possible mass needed to move a 63.5 kg mass? To find this, I need to know the force need to move the known mass, time the unknown mass stays in contact with the known mass, and velocity at which the unknown mass is traveling. I believe I can find out the rest of this information if I know the average force required to move a 63.5 kg mass.

**2. Relevant equations**

F = ma, I = F

_{av}[tex]\Delta[/tex]t = [tex]\Delta[/tex]p, p = mv

**3. The attempt at a solution**

What I have done so far....nothing really. I need this information to move forward, and I don't know of a way to calculate it with the information available.