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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > Two men A and B of masses 50 kg and 70 kg respectively are standing on the ends of a plank of mass 80 kg. The length of plank is 5 m and it is kept on a smooth horizontal surface. Now man starts moving and exchange their positions on the plank. Then

Two men A and B of masses 50 kg and 70 kg respectively are standing on the ends of a plank of mass 80 kg. The length of plank is 5 m and it is kept on a smooth horizontal surface. Now man starts moving and exchange their positions on the plank. Then

A strip of wood mass M and length l is placed on a smooth horizontal surface. An insect of mass m starts from rest at one end of the strip and walks to the other end in time t moving with a constant speed. The speed of the insect as seen from the ground is