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Standard XII

Physics

1st Equation of Motion

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 (given g = 10 $m s^{- 2}$ )

[Kerala (Engg.) 2000]

100 ms-2

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3 ms-2

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10 ms-2

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30 ms-2

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Solution

The correct option is B
3 ms-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) [Kerala (Engg.) 2000]

The correct option is B 3 ms-2 a=m2m1+m2g=37+310=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 (given g = 10 $m s^{- 2}$ )

[Kerala (Engg.) 2000]

The correct option is B
3 ms-2

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