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## Homework Statement

1. Suppose a hanging 1.0kg lab mass is attached to a 4.0kg block on the table

(The picture)

a. If the coefficient of kinetic friction, [tex]\mu[/tex]k is .2, what is the acceleration?

b. What would the mininum value of the coefficient of static friction, [tex]\mu[/tex]s, in order for the block to remian motionless

## Homework Equations

a = f/m

[tex]\mu[/tex] = frictional force / normal force

## The Attempt at a Solution

a) .2 = friction/50 (i got 50 from 5 [the two blocks] multiplied by gravity)... friction = 10

a = 10/5

a = 2m/s

b) idk how to figure this out?