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A body of mass is whirled with a velocity of using length string which can withstand a tension of . Neglecting the force of gravity on the body predict whether the string will break or not.
Important Questions on Laws of Motion
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Where R is in meters, t is in seconds and and denote unit vectors along x- and y-directions, respectively. Which one of the following statements is wrong for the motion of particle?

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A smooth circular groove has a smooth vertical wall as shown in figure. A block of mass moves against the wall with a speed . Which of the following curve represents the correct relation between the normal reaction on the block by the wall and speed of the block ?

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Two spheres of equal masses are attached to a string of length as shown in figure. The string and the sphere are then whirled in a horizontal circle about at a constant rate. What is the value of the ratio?
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