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To determine how large the force must be to keep the bulletin board from slipping, we can use the equation:
Force of static friction (fs) = coefficient of static friction (μ) * Normal force (N)
In this scenario, the normal force (N) is equal to the weight (W) of the bulletin board, which is given as 7.01 N.
So, plugging in the values we know:
fs = μ * N
fs = 0.44 * 7.01 N
fs ≈ 3.08 N
Therefore, the force you need to apply to keep the bulletin board from slipping is approximately 3.08 N.