A person of mass $m$ is standing on one end of a plank of mass $M$ and length $L$ and floating in water. The person moves from one end to another and stops. The displacement of the plank is :
A cube of 3 side L floats in a liquid of density 3 times the density of cube. What length of the cube will out side the liquid?
A wire of length L M made a material of specific gravity 8 is floating horizontally on the surface of water. If it is not wet by water the maximum diameter of the wire in millimetre which it can continue to floaters
If an ice cube a with impurities is floating in the water container and after few minutes ice melts and impurities are sink down then find the level of water in that container :
A beaker containing water weighs $100$ g. It is placed on the pan of a balance and a piece of metal weighing 70 g and having a volume of $10c{m^3}$ is placed inside the water in beaker. The weight of the beaker and the metal would be:
equal to the weight of the immersed part of the body 2 . A raft of wood of mass 120 kg floats in water . The weight C that can be on the raft on make it just sink , should be $(d _{raft} = 600 kg/m _{3} )$
A wooden cube floating in water supports a mass $0.2 kg$ When the mass is removed the cube rises by $2 cm.$ The side of the cube is (density of water=${10^3}kg/{m^3}$)
The material of wire has specific gravity 8. It is not wetted by water, what is the diameter of the wire that will float on the surface of water?(T =70 dy /cm)
A ball rise with constant velocity, to the surface of a liquid whose density is four times that of the ball. The ratio of the v force to weight of the ball is
A balloon has volume of 1000 $m^{3}$ . It is filled with hydrogen ($ \rho $ = 0.09 g/L ) . If the density of air is 1.29 g/L , it can lift a total weight of