A)
B)
C)
D)
Correct Answer: D
Solution :
In option (a), force on both ends is equal and from bottom of plank. It will lift up the plank. In option (b), force on right side bottom is more. It will pull the plank up from this side. Similarly in option (c), plank will move down on left side. But in case (d), the plank may not move at all due to equal downwards forces on opposite sides. If forces on both side equally exceed the bearing limit of the plank then the plank may break at the point of fulcrum.
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