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Standard XII

Physics

Spring Force

Two blocks A ...

Question

Two blocks $A$ and $B$ of masses $m$ and $2 m$ respectively are held at rest such that the spring is in natural length. Find out the accelerations of both the blocks just after release:

g ↓, g ↓

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\frac{g}{3} ↓, \frac{g}{3} ↑

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0, 0

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g ↓, 0

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Solution

The correct option is A $g ↓, g ↓$
In this case spring force is zero initially
F.B.D. of $A$ and $B$

Now using newton's 2nd law
$F_{net} = m_{s y s t e m} a$
$a = g$ is both the cases.

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Two blocks A and B of masses m and 2m respectively are held at rest such that the spring is in natural length. Find out the accelerations of both the blocks just after release:

The correct option is A g↓,g↓In this case spring force is zero initially F.B.D. of A and B Now using newton's 2nd law Fnet=msystema a=g is both the cases.

Two blocks $A$ and $B$ of masses $m$ and $2 m$ respectively are held at rest such that the spring is in natural length. Find out the accelerations of both the blocks just after release:

The correct option is A $g ↓, g ↓$
In this case spring force is zero initially
F.B.D. of $A$ and $B$

Now using newton's 2nd law
$F_{net} = m_{s y s t e m} a$
$a = g$ is both the cases.