A uniform plank is resting over a smooth horizontal floor and is pu...

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A uniform plank is resting over a smooth horizontal floor and is pulled by applying a
\( \mathrm{P} \) horizontal force at its one end. Which of the

W following statement is correct ?
(1) A uniform tensile stress is developed in the plank material
(2) Stress developed in plank material is maximum at the end at which force is applied and decrease linearly to zero at the other end
(3) Since plank is pulled at one end only therefore plank starts to accelerate along direction of the force. Hence, no stress is developed in the plank material.
(4) None of these
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