Laws of MotionMedium
Question
Reading shown in two spring balances S1 and S2 is 90 kg and 30 kg respectively when lift is accelerating upwards with acceleration 10 m/s2. The mass is stationary with respect to lift. Then the mass of the block will be :
Options
A.60 kg
B.30 kg
C.120 kg
D.None of these
Solution
900 − 300 − m × 10 = ma 600 = m (10 + a)
= m
= m = 
= 30 kgCreate a free account to view solution
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