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: (a) 40N, 64N (b) 60N, 80N (c) 80N, 100N (d) 88N, 96N

Answer: (a). a = (80)/(5 + 3 + 2) = 8 m/s² T₁ pulls A only: T₁ = 5 × 8 = 40 N. T₂ pulls A and B: T₂ = (5 + 3) × 8 = 64 N. So the answer is (a) 40 N, 64 N.

Three blocks A, B and C are pulled on a horizontal smooth surface by… | JEE Main 2024 (30 Jan, Shift 2)

Q10JEE Main 2024 · 30 JAN · SHIFT 2Easy

Connected Bodies & Pulleys

Three blocks $A, B$ and $C$ are pulled on a horizontal smooth surface by a force of $80\text{ N}$ as shown in figure

The tensions T $1$ and T $2$ in the string are respectively:

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Answer: (a)

$a = \dfrac{80}{5 + 3 + 2} = 8\text{ m/s}^2$
$T_1$ pulls A only: $T_1 = 5 \times 8 = 40\text{ N}$ .
$T_2$ pulls A and B: $T_2 = (5 + 3) \times 8 = 64\text{ N}$ .
So the answer is (a) 40 N, 64 N.

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