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Three blocks A , B and C each of mass 2 k g , are hanging over a fixed pulley as shown in the figure. The tension in the string connecting B and C is

Options

  1. AZero
  2. B3.3 N
  3. C13.3 N
  4. D19.6 N

Correct answer

C. 13.3 N

Step-by-step solution

The combination of blocks A , B and C is shown in figure. a = m + m g - m g m + m + m = g 3 m g - T = m a = m g 3 T = 2 m g 3 = 2 3 × 2 × 10 = 13.3 N

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