# A uniform rod of mass and length is placed over a smooth horizontal surface along the -axis and is at rest as shown in Figure. An impulsive force is applied for a small time along -direction at point . The -coordinate of end of the rod when the rod become parallel to -axis for the first time is [initially, the coordinate of centre of mass of the rod is  a) b) c) d) s

## Question ID - 100226 :- A uniform rod of mass and length is placed over a smooth horizontal surface along the -axis and is at rest as shown in Figure. An impulsive force is applied for a small time along -direction at point . The -coordinate of end of the rod when the rod become parallel to -axis for the first time is [initially, the coordinate of centre of mass of the rod is  a) b) c) d) s

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 (d) As torque =change in angular momentum (linear momentum)    …(i) and (angular momentum)   …(ii) Dividing Eqs. (i) and (ii), we get Using Displacement of CM is and Dividing, we get Coordination of will be Next Question :

Two men ‘ ’ and ‘ ’ are standing on a plank. ‘ ’ is at the middle of the plank and is at the left end of the plank. Lower surface of the plank is smooth. System is initially at rest and masses are as shown in fig. ‘ ’  and ‘ ’ start moving such that the position of remains fixed with respect to ground, then ‘ ’ meets Then the point where meets is located at a) The middle of the plank b) 30 cm from the left end of the plank c) The right end of the plank d) None of these 