MCQ
All surfaces shown in figure are assumed to be frictionless and the pulleys and the string are light. The acceleration of the block of mass $2 \mathrm{~kg}$ is :
- A$g$
- ✓$\frac{g}{3}$
- C$\frac{g}{2}$
- D$\frac{g}{4}$
✓
Answer
Correct option: B.
$\frac{g}{3}$
b
$ 40-2 \mathrm{~T}=4 \mathrm{a} $
$ 40-2 \mathrm{~T}=4 \mathrm{a} $
$ \mathrm{T}-10=4 \mathrm{a} \Rightarrow 20=12 \mathrm{a} $
$ \Rightarrow \mathrm{a}=5 / 3 \Rightarrow 2 \mathrm{a}=\frac{g}{3}$
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