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Standard XII

Physics

Applying NLM along 3 Axis

Two blocks of...

Question

Two blocks of masses 3kg and 2kg repectively are tied to the ends of a string which passes over a light frictionless pully.The masses are held at rest at the same horizontal level and then released.The distance traversed by centre of mass by 5 sec is( $g = 10$ )

2.5m

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10m

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12.5m

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Solution

The correct option is D 5m
Correct option is $(B)$
As we know ; Fnet $= m a$
$(M - m) g = (M + m) a$
On putting values,
$\begin{matrix} a_{c M} & = \frac{M a^{\frac{5}{5}} m / s^{2}}{M + m} a = \frac{2}{5} \times \frac{5}{5} = \frac{2 m / s^{2}}{5} D & = \frac{1}{2} a t^{2} = \frac{1}{2} \times \frac{2}{5} \times 25 = 5 m \end{matrix}$

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Two blocks of masses 3kg and 2kg repectively are tied to the ends of a string which passes over a light frictionless pully.The masses are held at rest at the same horizontal level and then released.The distance traversed by centre of mass by 5 sec is(g=10)

The correct option is D 5mCorrect option is (B) As we know ; Fnet =ma (M−m)g=(M+m)a On putting values, acM=Ma55m/s2M+ma=25×55=2m/s25D=12at2=12×25×25=5m

Two blocks of masses 3kg and 2kg repectively are tied to the ends of a string which passes over a light frictionless pully.The masses are held at rest at the same horizontal level and then released.The distance traversed by centre of mass by 5 sec is( $g = 10$ )