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Q.

A string is holding a solid block below the surface of a liquid. The density of liquid is greater than that of solid. The tension in the string isT0 . When the system is at rest. What will be the tension in the string if the system has upward acceleration a?

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a

T0[1+2ag]

b

T0[1+ag]

c

T0[1+ga]

d

T0[1−ga]

answer is C.

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Detailed Solution

Tension in the string = upward thrust – weight of the body

T0=Vg(ρ1−ρ)---(1)

T=V(a+g)(ρ1−ρ)=Vg(1+ag)(ρ1−ρ)   from (1) 

T=T0(1+ag)

 

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