Q145 / 180 · KCET 2009 · Physics

Three concurrent co-planar forces $1 \mathrm{~N}, 2 \mathrm{~N}$ and $3 \mathrm{~N}$ acting along different directions on a body

  • A
    can keep the body in equilibrium if $2 \mathrm{~N}$ and $3 \mathrm{~N}$ act at right angle
  • B
    can keep the body in equilibrium if $1 \mathrm{~N}$ and $2 \mathrm{~N}$ act at right angle
  • Correct answer
    C
    cannot keep the body in equilibrium
  • D
    can keep the body in equilibrium in $1 \mathrm{~N}$ and $3 \mathrm{~N}$ act at an acute angle

Solution

If we keep $1 \mathrm{~N}$ and $2 \mathrm{~N}$ forces act in same direction then these are balanced by $3 \mathrm{~N}$ force, but this is against statement of question. Hence, options (c) is correct.

Hence, the correct answer is option: 'C'.

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