InterviewSolution
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InterviewSolution
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A solid cube floats in water half immersed and h small vertical oscillations of time period `pi/5`s. Find the mass (in kg) (Take g=10m/`s^(2)`.A. 4B. 2C. 1D. 0.5 |
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Answer» Correct Answer - A (a) Since, the cube is half immersed. The density of cube should be half the density of water, i.e., `500 kgm^(-3)` `T=2pisqrt((m)/(rho_(u)Ag)) " "(k=rho_(u)Ag)` `(pi)/(5)=2pisqrt((a^(3)xx rho)/(rho_(w)xx a^(2) xx g))` `therefore (arho)/(grho_(w))=(1)/(100)` `therefore (a)/(20)=(1)/(100)` or a=(0.2)m Now, `m=a^(3)rho=4 kg" "`(`because` Mass =Density `xx` Volume) |
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