A man of mass m is standing on a platform of mass M kept on smooth ice. If the man starts moving on the platform with a speed v relative to the platform with what velocity relative to the ice does the platform recoil?

A man of mass 60 kg is standing on a boat of mass 140 kg, which is at rest in still water. The man is initially at 20 m from the shore. He starts walking on the boat for 4 s with constant speed 1.5 m/s towards the shore. The final distance of the man from the shore is

A man of mass 62 kg is standing on a stationary boat of mass 238 kg. The man is carrying a sphere of mass 0.5 kg in his hands. If the man throws the sphere horizontally with a velocity of 12 ms^(-1) , find the velocity with which the boat will move (in magnitude)

A boy of mass 60kg is standing over a platform of mass 40kg placed over a smooth horizontal surface. He throws a stone of mass 1kg with velocity v=10m//s at an angle of 45^@ with respect to the ground. Find the displacement of the platform (with boy) on the horizontal surface when the stone lands on the ground. Take g=10m//s^2 .

A boy of mass 60kg is standing over a platform of mass 40kg placed over a smooth horizontal surface. He throws a stone of mass 1kg with velocity v=10m//s at an angle of 45^@ with respect to the ground. Find the displacement of the platform (with boy) on the horizontal surface when the stone lands on the ground. Take g=10m//s^2 .

A man of mass 80 kg stands on a plank of mass 40 kg . The plank is lying on a smooth horizontal floor. Initianlly both are at rest. The man starts walking on the plank towards north and stops after moving a distance of 6 m on the plank. Then

As shown in the figure, M is a man of mass 60 kg standing on a block of mass 40 kg kept on ground. The co-efficient of friction between the feet of the man and the block is 0.3 and that between B and the ground is 0.1. If the man accelerates with an acceleration 2(m)/(s^2) in the forward direction, then,

Two men to masses 80kg and 60kg are standing on a wood plank of mass 100kg , that has been placed over a smooth surface. If both the men start moving towards each other with speeds 1m//s and 2 m//s respectively then find the velocity of the plank by which it starts moving.

A person of 80 kg mass is standing on the rim of a circular platform of mass 200 kg rotating about its axis at 5 revolutions per minute (rpm). The person now starts moving towards the centre of the platform. What will be the rotational speed (in rpm) of the platform when the person reaches its centre___________.

A man of mass 60 kg is standing on a weighing machine kept in a box of mass 30 kg as shown in the diagram, If the man manages to keep the box stationary find the reading of the weighing machine.