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NEET 2022 (Phase 2) · Connected Bodies & Pulleys

Connected Bodies & Pulleys question from NEET 2022 (Phase 2)

Q21NEET 2022 · PHASE 2Easy

Connected Bodies & Pulleys

In the diagram shown, the normal reaction force between 2 kg and 1 kg is (Consider the surface, to be smooth):

(Given g = 10 ms−2{}^{-2})

Figure

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Answer: (b)

  1. Whole system (6 kg) along the incline: 60−18−6gsin⁡30∘=6a⇒60−18−30=6a60 - 18 - 6g\sin 30^\circ = 6a \Rightarrow 60 - 18 - 30 = 6a.
  2. a=2 m/s2a = 2\text{ m/s}^2 up the incline.
  3. For the 1 kg block: N−18−1×10×12=1×2⇒N=25 NN - 18 - 1 \times 10 \times \frac{1}{2} = 1 \times 2 \Rightarrow N = 25\text{ N}.
  4. So the answer is (b) 25 N.
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