A block of mass m slides on a horizontal floor while a force F is applied at angle θ above the horizontal. The coefficient of kinetic friction is μₖ. The acceleration a is:

Question

G1 Physics · Accepted Answer

Vertical equilibrium gives N = mg - F sinθ. Kinetic friction is μₖN = μₖ(mg-F sinθ). Horizontally, ma = F cosθ - μₖ(mg-F sinθ). Dividing by m gives option B.