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With two forces acting at a point, the maximum effect is obtained when their resultant is 4 ~N . If they act at right angles, then their resultant is 3 ~N . Then the forces are

Options

  1. A(2+ 2 ) N and (2- 2 ) N
  2. B(2+ 3 ) N and (2- 3 ) N
  3. C(2+ 1 2 2 ) N and (2- 1 2 2 ) N
  4. D(2+ 1 2 3 ) N and (2- 1 2 3 ) N

Correct answer

C. (2+ 1 2 2 ) N and (2- 1 2 2 ) N

Step-by-step solution

P+Q=4, P^2+Q^2=9 P= (2+ 1 2 2 ) N and Q= (2- 1 2 2 ) N

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