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General
Easy
Question
In the figure shown a long cart moves on a smooth horizontal surface due to an external constant force of magnitude F. Initial mass of the cart is M0 and velocity is zero. At t = 0 sand starts falling from a stationary hopper on to the cart with negligible velocity at constant rate 
kg/s and sticks to the cart The velocity of the cart at time t(<t0)
The correct answer is:
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