Laws Of Motion Question 65
Question: The spring balance A reads 2 kg with a block m suspended from it. A balance B reads 5 kg when a beaker filled with liquid is put on the pan of the balance. The two balances are now so arranged that the hanging mass is inside the liquid . In this situation[IIT 1985]
Options:
A)The balance A will read more than 2 kg
B) The balance B will read more than 5 kg
C) The balance A will read less than 2 kg and B will read more than 5 kg
D) The balances A and B will read 2 kg and 5 kg respectively
Show Answer
Answer:
Correct Answer: B
Solution:
Force of upthrust will be there on mass m, so A weighs less than 2 kg. Balance will show sum of load of beaker and reaction of upthrust so it reads more than 5 kg.
