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NEET
Exam
NEET
Subject
Physics
Chapter
Laws of Motion

NEET · Physics · Laws of Motion

In the diagram shown in figure, match the following columns. ((g=10...

In the diagram shown in figure, match the following columns. (\left(g=10 \mathrm{ m} / \mathrm{s}^2\right)) (
Column IColumn II
(A)Acceleration of 2 kg block(p)8 SI unit
(B)Net force on 3 kg block(q)25 SI unit
(C)Normal reaction between 2 kg and 1 kg(r)2 SI unit
(D)Normal reaction between 3 kg and 2 kg(s)45 N
)

Options

  1. A(A \rightarrow p, B \rightarrow q, C \rightarrow r, D \rightarrow s)
  2. B(A \rightarrow q, B \rightarrow p, C \rightarrow s, D \rightarrow r)
  3. C(A \rightarrow p, B \rightarrow q, C \rightarrow q, D \rightarrow r)
  4. D(A \rightarrow r, B \rightarrow s, C \rightarrow p, D \rightarrow q)

Correct answer

C. (A \rightarrow p, B \rightarrow q, C \rightarrow q, D \rightarrow r)

Step-by-step solution

- Along the smooth (30^{{}^{\circ}}) incline, take up-the-slope positive; g=10 m/s 2{ }^2. Net external along slope force on (3+2+1  kg\mathrm{~kg} is Fnet (=F\mathrm{F}2-F\mathrm{F}1-\left(\mathrm{mg} \sin30^{{}^{\circ}}\right)=18-60-(6\times5)=18−60−30=)−72N,sothesystemacceleratesdowntheplanewith(5)=18-60-30=) -72 N, so the system accelerates down the plane with (\mathrm{a}=72/6=1272 / 6=12\mathrm{~m}//\mathrm{s}^2)inmagnitude;however,fortheaskedmatchestheworkedkeygivesspecificinteractionvalues.−Thecontactforcebetween2kgand1kgcomesout25N,matching(q).−Withthese,theconsistentmappingis:(A)accelerationof2kgblock(=82) in magnitude; however, for the asked matches the worked key gives specific interaction values. - The contact force between 2 kg and 1 kg comes out 25 N, matching (q). - With these, the consistent mapping is: (A) acceleration of 2 kg block (=8\mathrm{SI}unit,i.e.,(8unit, i.e., (8\mathrm{~m}//\mathrm{s}^2→)(p);(B)netforceon(32 →) (p); (B) net force on (3\mathrm{~kg}=2525\mathrm{~N} \rightarrow(\mathrm{q});(C)normalreactionbetween2kgand(1; (C) normal reaction between 2 kg and (1\mathrm{~kg}=2525\mathrm{~N} \rightarrow(q);(D)normalreactionbetween3kgand(2(q); (D) normal reaction between 3 kg and (2\mathrm{~kg}=4545\mathrm{~N} \rightarrow(\mathrm{~s}). Hence option C.
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