A block of mass 1 kg and density `0.8g//cm^(3)` is held stationary with the help of a string as shown in figure. The tank is accelerating vertically upwards with an acceleration a `=1.0m//s^(2)`. Find (a) the tension in the string, (b) if the string is now cut find the acceleration of block. (Take `g=10m//s^(2)` and density of water `=10^(3)kg//m^(3))`.A. `T=2.2N`B. `T=2.75N`C. `T=3N`D. `T=2.4N`

A block of mass 1 kg and density `0.8g//cm^(3)` is held stationary wit

1.	A block of mass 1 kg and density `0.8g//cm^(3)` is held stationary with the help of a string as shown in figure. The tank is accelerating vertically upwards with an acceleration a `=1.0m//s^(2)`. Find (a) the tension in the string, (b) if the string is now cut find the acceleration of block. (Take `g=10m//s^(2)` and density of water `=10^(3)kg//m^(3))`.A. `T=2.2N`B. `T=2.75N`C. `T=3N`D. `T=2.4N`
Answer» Correct Answer - B `F="upthrust force"=Vrho_(w)(g+a)` `=(("mass of block")/("Density of block"))rho_(w)(g+a)` `=(1)/(800)(1000)(11)=13.75N` `F-T-W=ma,13.75-T-10=1(1)` `T=2.75N`

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