MCQ
Three masses m, 2m and 3m are attached with light string passing over a fixed frictionless pulley as shown in the figure. The tension in the string between 2m and 3m is (g is acceleration due to gravity)
- A6 mg
- B3 mg
- C2 mg
- ✓1 mg
✓
Answer
Correct option: D.
1 mg
(D)
From the figure, tension between masses 2m and 3m is $T_2$
We know that,
$T _2=\left(\frac{2 m_1 m_3}{m_1+ m _2+ m _3}\right) g$
$\therefore \quad T _2=\frac{(2 m)(3 m)}{6 m} g = mg$
From the figure, tension between masses 2m and 3m is $T_2$
We know that,
$T _2=\left(\frac{2 m_1 m_3}{m_1+ m _2+ m _3}\right) g$
$\therefore \quad T _2=\frac{(2 m)(3 m)}{6 m} g = mg$
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