A block of mass 4 kg and volume `5xx10^(-4) m^(3)` is suspended by a spring balance in a lift which is accelerating. The apparent weight shown by the spring balance is 3 kg. Now the block is immersed in water in kg shown by the spring balance is

Options

A. 2.375
B. 2.625
C. 2.5
D. 3.125

Answer

B

Explanation

`3g=4(g-alpha)rArrg-a=(3g)/4`
`"Upthrust "=(5xx10^(-4))(10^(3))((3g)/4)N=0.375 kg`
`"Aparent weight"=(3-0.3375)=2.625 kg`