Laws Of Motion Question 9
Question 9 - 2024 (30 Jan Shift 1)
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 :
(1) $g$
(2) $\frac{g}{3}$
(3) $\frac{g}{2}$
(4) $\frac{g}{4}$
Show Answer
Answer: (2)
Solution:
$40-2 \mathrm{~T}=4 \mathrm{a}$
$\mathrm{T}-10=4 \mathrm{a} \Rightarrow 20=12 \mathrm{a}$
$\Rightarrow \mathrm{a}=5 / 3 \Rightarrow 2 \mathrm{a}=\frac{g}{3}$
