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Kinetic Energy

Two masses 2 ...

Question

Two masses 2 kg and 3 kg are attached to the end of the string passed over a pulley fixed at the top. The tension and acceleration are

A

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B

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C

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D

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Solution

The correct option is D

$T = \frac{2 m_{1} m_{2}}{m_{1} + m_{2}} g = \frac{2 \times 2 \times 3}{2 + 3} g = \frac{12}{5} g$
$a = \frac{m_{2} - m_{1}}{m_{1} + m_{2}} g = \frac{3 - 2}{3 + 2} g = \frac{g}{5}$

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