In the figure ball A is released from rest when the spring is at its natural length. For the block B of mass M to leave contact with ground at some stage, the minimum mass of A must be
Suppose when maximum displacement of the ball is x, when the mass M loses contact with the ground.
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The cylindrical tube of a spray pump has radius R, one end of which has n fine holes, each of radius r. If the speed of the liquid in the tube is V, the speed of the ejection of the liquid through the holes is:
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