A block of aluminium of mass 1 kg and volume 3.6 × 10-4 m 3 is suspended from a string and then completely immersed in a container of water. The decrese in tension in a container of water. The decrease in tension in the string after immersion is

Question

A block of aluminium of mass 1 kg and volume 3.6 × 10-4 m 3 is suspended from a string and then completely immersed in a container of water. The decrese in tension in a container of water. The decrease in tension in the string after immersion is (A) 9.8 N (B) 6.2 N (C) 3.6 N (D) 1.0 N

Tardigrade Admin · Accepted Answer

Here, mass of block =m=1 kg Volume of the block, V=3.6 × 10-4 m 3 Tension in the string, T=m g=m g-V ρ text water g ∴ Decrease in the tension of string T-T' =m g-[m g-v ρ text water g]=V ρ text water g =3.6 × 10-4 m 3 × 103 kgm -3 × 10 ms -2=3.6 N

Q. A block of aluminium of mass 1kg and volume 3.6×10−4m3 is suspended from a string and then completely immersed in a container of water. The decrese in tension in a container of water. The decrease in tension in the string after immersion is

9.8 N

6.2 N

3.6 N

1.0 N

Here, mass of block =m=1kg Volume of the block, V=3.6×10−4m3 Tension in the string, T=mg=mg−Vρwater ​g ∴ Decrease in the tension of string T−T′=mg−[mg−vρwater ​g]=Vρwater ​g =3.6×10−4m3×103kgm−3×10ms−2=3.6N

Q. A block of aluminium of mass $1 k g$ and volume $3.6 \times 1 0^{- 4} m^{3}$ is suspended from a string and then completely immersed in a container of water. The decrese in tension in a container of water. The decrease in tension in the string after immersion is