In three experiments, three different horizontal forces are applied to the same block lying on the same countertop. The force magnitudes are F1 = 12 N, F2 = 8 N, and F3 = 4 N. In each experiment, the block remains stationary in spite of the applied force. Rank the forces according to (a) the magnitude fs of the static frictional force on the block from the countertop and (b) the maximum value fs,max of that force, greatest first.

Question

In three experiments, three different horizontal forces are applied
to the same block lying on the same countertop. The force
magnitudes are F1 = 12 N, F2 = 8 N, and F3 = 4 N. In each experiment,
the block remains stationary in spite of the applied force.
Rank the forces according to (a) the magnitude fs of the static frictional
force on the block from the countertop and (b) the maximum
value fs,max of that force, greatest first.

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