JEE Main 2022 · 27 Jun · Shift 1 · Physics Q35

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PhysicsSingle correct+4 / -1Question 35 of 90

Two blocks of masses 10 kg and 30 kg are placed on the same straight line with coordinates $(0,0)$ cm and $(x,0)$ cm respectively. The block of 10 kg is moved on the same line through a distance of 6 cm towards the other block. The distance through which the block of 30 kg must be moved to keep the position of centre of mass of the system unchanged is :

4 cm towards the 10 kg block

2 cm away from the 10 kg block

2 cm towards the 10 kg block

4 cm away from the 10 kg block

Answer and worked solution

Official answer: C

Centre of mass fixed. $10(6)+30\,d=0$ , so $d=-2$ cm: 2 cm towards the 10 kg block.

(C)

Topics:Centre of mass

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JEE Main 2022 · 27 Jun · Shift 1, Physics question 35