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Standard XII

Physics

Pulley

A block A of ...

Question

A block A of mass 7 kg is placed on a frictionless table. A thread tied to it passes over a frictionless pulley and carries a body B of mass 3 kg at the other end. The acceleration of the system is $(g i v e n g = 10 m s^{- 2})$

$100 m s^{- 2}$

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$3 m s^{- 2}$

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$10 m s^{- 2}$

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$30 m s^{- 2}$

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Solution

The correct option is B
$3 m s^{- 2}$

$a = [\frac{m_{2}}{m_{1} + m_{2}}] g = [\frac{3}{7 + 3}] 10 = 3 m / s^{2}$

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A block A of mass 7 kg is placed on a frictionless table. A thread tied to it passes over a frictionless pulley and carries a body B of mass 3 kg at the other end. The acceleration of the system is (given g=10 ms−2)

The correct option is B 3 ms−2 a=[m2m1+m2]g=[37+3]10=3m/s2

A block A of mass 7 kg is placed on a frictionless table. A thread tied to it passes over a frictionless pulley and carries a body B of mass 3 kg at the other end. The acceleration of the system is $(g i v e n g = 10 m s^{- 2})$

The correct option is B
$3 m s^{- 2}$

$a = [\frac{m_{2}}{m_{1} + m_{2}}] g = [\frac{3}{7 + 3}] 10 = 3 m / s^{2}$