# 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

## Question ID - 100227 :- 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

3537

(c)

Taking the origin at the center of the plank,

(Assuming the centres of the two men are exactly at the axis as shown in fig.)

Hence,  and   meet at the right end of the plank

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 Two particles of equal masses have velocities  m/s and  at any instant. The first particle has a constant acceleration while the acceleration of the other particle is zero. The centre of mass of the two particles moves in a a) Circle b) Parabola c) Straight line d) Ellipse