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Sahay Sir > Question Answers > Arihant Physics by D.C Pandey > Volume 1 > Chapter 8 - COM, Momentum and Collision > A boy of mass 60 kg is standing over a platform of mass 40 kg placed over a smooth horizontal surface. He throws a stone of mass 1 kg with velocity v=10 m/s at an angle 450 with respect to the ground.Find the displacement of the platform (with boy) on the horizontal surface when the stone lands on the ground. (g=10m/s2)

A boy of mass 60 kg is standing over a platform of mass 40 kg placed over a smooth horizontal surface. He throws a stone of mass 1 kg with velocity v=10 m/s at an angle 450 with respect to the ground.Find the displacement of the platform (with boy) on the horizontal surface when the stone lands on the ground. (g=10m/s2)

A metre rule weighing 100 g rests on a table with a part projecting over the edge. the length of the part projecting out if a 5 g body hung at the end just tills the rule is .