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A force F=t is applied to a block A as s...


A force `F=t` is applied to a block A as shoen in figure where t is time in seconds. The force is applied at `t=0` seconds when the system was at rest. Which of the following graph correctly gives the frictional force between A and horizontal surface an a function of time t. [Assume that at `t=0`, tension in the string connecting the two blocks is zero].

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