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A sphere of radius 10cm and density 500k...

A sphere of radius 10cm and density `500kg//m^(3)` is under water of density `1000kg//m^(3)` The acceleration of the sphere is `9.80m//s^(2)` upward viscosity of water is 1.0 centipoise if `g=9.81m//s^(2)` the velocity of the sphere is

A

`9m//s`

B

`10m//s`

C

`11m//s`

D

`12m//s`

Text Solution

Verified by Experts

The correct Answer is:
C
`100xx4/3pir^(3)g-500xx4/3pir^(3)g-6pietarv=500xx4/3pir^(3)a`
`0.2/3=6xx1xx10^(-3)`
`200/18=v`
`11m//s Ans`
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BANSAL-MASTER PRACTICE PROBLEM-Additional topic
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