A man weighing 80 kg is standing at the centre of a flat boat and he is 20 m from the shore. He walks 8 m on the boat towards the shore and then halts.The boat weight 200 kg. How far is he from the shore at the end of this time ?

A man weighting 60 kgis standing at the centre of a flat boat and he is 20 m from the shore. He walks 8 cm on the boat towards the shore and then halts. The boat weights 200 kg How far is the from the shore at the end of this time? [Hints : As the system is free from external force, centre of mass of the system consisting of man and boat must not move.

A dog weighing 5kg is standing on a flat boat so that it is 10 metres from the shore. It walks 4m on the boat towards the shore and then halts. The boat weighs 20kg and one can assume that there is no friction between it and water. The dog from the shore at the end of this time is

(i) Find the acceleration of the centre of mass of two particle approaching towards each other under their own grabitational field. (ii) A boy of mass 30 kg is standing on a flat boat so that he is 20 meter from the shore. He walks 8 m on the boat towards the shore and then stops. The mass of the boat is 90 kg and friction between the boat and the water surface is negligible. How far is the boy from the shore now ?

A man weighing 70 kg is standing at the centre of a flat boat of mass 350 kg. The man who is at a distance of 10 m from the shore walks 2 m towards it and stops. How far will he be from the shore? Assume the boat to be of uniform thickness and neglect friction between boat and water?