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  • A beaker containing water is kept on a spring scale. The mass of water and beaker is 5 kg. A block of mass 2kg and specific gravity 10 is suspended by mean of thread from a spring balance as shown

A beaker containing water is kept on a spring scale. The mass of water and beaker is 5 kg. A block of mass 2kg and specific gravity 10 is suspended by mean of thread from a spring balance as shown in figure. The readings of scales are S_1 \text { and } S_2 , respectively \left(g=10 \mathrm{~m} / \mathrm{s}^2\right)

Option: 1

52N and 20N


Option: 2

50N and 15N


Option: 3

52N and 18N


Option: 4

52N and 22N


Answers (1)

best_answer

Upthrust = \frac{2}{10} \times 1 \times 10=2 \mathrm{~N}

Reading of S_1 will increase by 2N while that of S_2 will decrease by 2N.

\therefore \quad S_1=(5 \times 2)+2=52 \mathrm{~N}

S_2=(2 \times 2)-2=18 \mathrm{~N}

Posted by

avinash.dongre

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