Consider a block kept on an inclined plane (inclined at 45∘) as shown in the figure. If the force required to just push it up the incline is 2 times the force required to just prevent it from sliding down, the coefficient of friction between the block and inclined plane (μ) is equal to:
(1) 0.33
(2) 0.60
(3) 0.25
(4) 0.50