Pathfinder Impulse & Momentum MCQ 21 & 22
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0A plank of mass 1.5 kg is placed on a horizontal floor that is lubricated with oil. Top of the plank is in level with a platform as shown in the figure. Force of viscous drag on the plank due to layer of lubricating oil, when the plank slides is given by equation f = -kv, where f is in N, v is velocity of the plank in m/s and k = 2.0 kg/s. A small block of mass 0.5 kg lands from the platform on the plank with a velocity 10 m/s and after sliding some distance on the plank, the block stops on the plank.
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