A fisherman hooks an old log of wood of weight 12 N and volume 1000 `cm^(3)`. He pulls the log half way out of water. The tension in the string at this instant is

A string is wrapped around a log of wood and it is pulled with a force F as shown in (b) How does the value of tension T in the string change with theta when will the tension T be greater than applied force?

A brass wire of length 5m and cross section 1mm^(2) is hung from a rigid support, with a brass weight of volume 1000 cm^(3) hanging from the other end. Find the decrease in the length of the wire, when the brass weight is completely immersed in water. (Y_("brass")=10^(11)Nm^(-2), g=9.8ms^(-2), rho_("water")=1g cm^(-3))

A block of wood of weight 200 g floats on the surface of water. If the volume of block is 300 cm^(3) calculate the upthrust due to water.

An iron casting containing a number of cavities weight 6000N in air and 4000N in water. What is the volume of the cavities in the casting? Density of iron is 7.87g//cm^(3) . Take g = 9.8 m//s^(2) and density of water = 10^(3) kg//m^(3) .

An iron casting containing a number of cavities weight 6000N in air and 4000N in water. What is the volume of the cavities in the casting? Density of iron is 7.87g//cm^(3) . Take g = 9.8 m//s^(2) and density of water = 10^(3) kg//m^(3) .

An iron casting containing a number of cavities weight 6000N in air and 4000N in water. What is the volume of the cavities in the casting? Density of iron is 7.87g//cm^(3) . Take g = 9.8 m//s^(2) and density of water = 10^(3) kg//m^(3) .

A thin metal ring of internal radius 8 cm and external radius 9 cm is supported horizontally from the pan of a balance so that it comes in contact with water in a glass vessel. If is found that an extrea weight of 7.48g is required to pull the ring out of water. The surface tension of water is (g=10m//s^(2))

A thin metal ring of internal radius 8 cm and external radius 9 cm is supported horizontally from the pan of a balance so that it comes in contact with water in a glass vessel. If is found that an extrea weight of 7.48g is required to pull the ring out of water. The surface tension of water is (g=10m//s^(2))

A wooden block of volume 1000 cm^(3) is suspended from a spring balance. It weighs 12 N in air. It is suspended in water such that half of the block is below the surface of water. The reading of the spring balance is

A string can withstand a maximum tension of 3kgxxg . A stone of mass 3.5 kg is suspended in water by the string. What part of the stone should be drawn out of the water bu pulling the string so that the string snaps? The specific gravity of stone = 1.5.