Laws Of Motion Question 175
Question: In the above problem if the lift moves up with an acceleration equal to the acceleration due to gravity, the reading on the spring balance will be[NCERT 1977]
Options:
A) 2 kg
B) $ (2\times g)kg $
C) $ (4\times g)kg $
D) 4 kg
Show Answer
Answer:
Correct Answer: D
Solution:
When lift moves upward then reading of the spring balance, $ R=m(g+a)=2(g+g)=4g\ N=4\ kg $ [As $ a=g $ ]
