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Q2. A block of mass 250 kg rests on a plane inclined at 45º. A force F is applied horizontally as shown in Fig Q2. The coefficient of friction between the block and the plane is 0.3.

Calculate EACH of the following:

(a) the value of F required to just start to move the block up the plane with a constant velocity. (10)

(b) the value of F required to hold the block stationary on the plane. (3)

(c) the magnitude and direction of the friction force if F = 1.8 kN. (3)