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JEE Main202430 Jan 2024Evening ShiftPhysicsLaws of MotionActual

Three blocks A , B and C are pulled on a horizontal smooth surface by a force of 80 N as shown in figure. The tensions T 1 and T 2 in the string are respectively:

Options

  1. A40 N , 64 N
  2. B60 N , 80 N
  3. C88 N , 96 N
  4. D80 N , 100 N

Correct answer

A. 40 N , 64 N

Step-by-step solution

Since, the length of the string will remain same. Hence, all blocks will have the same acceleration. a A = a B = a C = F 5 + 3 + 2 = 80 10 = 8 m s - 2 Therefore, T 1 = 5 × 8 = 40 N . Now, T 2 - T 1 = 3 × 8 ⇒ T 2 = 64 N

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