Show that when a block of weight is pulled along a rough horizontal surface by a…
PHYSICS · Subjective · CBSE · Physics · Laws of Motion · Laws of Motion
Problem
Show that when a block of weight W is pulled along a rough horizontal surface by a force F acting at an angle θ above the horizontal, the value of F is minimum when tanθ=μs, where μs is the coefficient of static friction. Hence obtain the expression for this minimum force in terms of W and μs.