An iron block is suspended from a string and is then completely immersed in a container of water. The mass of iron is 1 kg and its density is 7200 kg //m^(3). What is the tension in the string before and after the iron block is immersed ?

An iron block is suspended from a string and is then completely immers

1.	An iron block is suspended from a string and is then completely immersed in a container of water. The mass of iron is 1 kg and its density is 7200 kg //m^(3). What is the tension in the string before and after the iron block is immersed ?
Answer» Solution :Before ` T_1= MG =1 xx 9.8 = 9.8 N , `After ` T_2= mg -U = mg - (mdg//D)` `= 9.8 - (1xx 1000xx 9.8 //7200) = 8.44 N`