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Velocity Ratio

In the figure...

Question

In the figure shown the man of mass 60kg is lowering a block of mass 10kg with an acceleration of $2 m / s^{2}$ . Find the reading of the machine.

A

58kg

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B

68kg

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C

78kg

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D

88

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Solution

The correct option is C 78kg
$m g - T = m a,$

$10 \times 10 - 10 \times 2 = T$

$T = 98 - 20$

$T = 78 k g$

This is the reading I m/c

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