Laws Of Motion Question 173
Question: A body of mass 2 kg is hung on a spring balance mounted vertically in a lift. If the lift descends with an acceleration equal to the acceleration due to gravity ?g?, the reading on the spring balance will be[NCERT 1977]
Options:
A) 2 kg
B) $ (4\times g)kg $
C) $ (2\times g)kg $
D) Zero
Show Answer
Answer:
Correct Answer: D
Solution:
Reading on the spring balance = m (g a) and since a = g\ Force = 0
