In shown situation elevator is moving upward with acceleration of 5 m / s 2 . If m A = 20 kg , m B = 30 kg , m C = 50 kg then choose the correct match. Column I Column II (P) Net force acting on

Question

In shown situation elevator is moving upward with acceleration of $5 m / s^{2}$ . If $m_{A} = 20 kg, m_{B} = 30 kg, m_{C} = 50$ kg then choose the correct match.

Column I	Column II
(P) Net force acting on B	(1) 350 N
(Q) Normal reaction between A and B	(2) 300 N
(R) Normal reaction between B and C	(3) 150 N
(S) Normal reaction between C and elevator	(4) 750 N
	(5) 1500 N

TestHub · Accepted Answer

(P) Net force on B F B ​ = m B ​ a = 30 × 5 = 150 N P→3 (Q) Normal between A and B N A B ​ = m A ​ g e ff ​ = 20 × 15 = 300 N Q→2 (R) Normal between B and C N BC ​ = ( m A ​ + m B ​ ) g e ff ​ = ( 20 + 30 ) × 15 = 50 × 15 = 750 N R→4 (S) Normal between C and elevator N CE ​ = ( 20 + 30 + 50 ) × 15 = 100 × 15 = 1500 N S→5 P→3, Q→2, R→4, S→5 Option C

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JEE Advanced 2027 (Class 12+)