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    Physics
    Mechanics
    Easy

    Question

    An equilateral triangle ABC has its centre at O as shown in figure. Three forces 10 N, 5N and F are acting along the sides AB, BC and AC. Magnitude of F so that the net torque about ‘O’ is zero is

    1. 15 N
    2. 5 N 
    3. 50 N
    4. 2 N

    The correct answer is: 15 N

      Fd – 10d – 5d = 0;      F = 15 N

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