A vessel filled with water is kept on a weighing pan and the scale adjusted to zero .A block of mass M and density rho is suspended by a massless spring of spring constant k. This block is submerged inside into the water in the vessel .What is the reading of the scale ?

A vessel filled with water is kept on a weighing pan and the scale adj

1.	A vessel filled with water is kept on a weighing pan and the scale adjusted to zero .A block of mass M and density rho is suspended by a massless spring of spring constant k. This block is submerged inside into the water in the vessel .What is the reading of the scale ?
Answer» Solution : Take a figure into consideration . The scale is adjusted to zero .THEREFORE , when a block suspended to a SPRING is immersed in water , then the reading of the scale will be equal to the upthrust on the block DUE to water. Upthrust experienced by the block=weight of displaced water `=(V)rho_(w)g ""("V = volume of block")` `=(m)/(rho)rho_(w)g "" (rho_(w)= " density of water")` `=((rho_(w))/(rho))mg ""(rho="density ofblock")`