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Standard XII

Physics

Average Velocity in 2D Motion

Reading shown...

Question

Reading shown in two spring balances S1 and S2 is 90 kg and 30 kg respectively when lift is accelerating upwards with acceleration 10 m/s2. The mass is stationary with respect to lift. Then the mass of the block will be

60 kg

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30 kg

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120 kg

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None of these

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Solution

The correct option is B
30 kg

$m (g + a) = (S_{1} - S_{2}) g$

$\Rightarrow$ m = 30 kg

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Reading shown in two spring balances S1 and S2 is 90 kg and 30 kg respectively when lift is accelerating upwards with acceleration 10 m/s2. The mass is stationary with respect to lift. Then the mass of the block will be

The correct option is B 30 kg m(g+a)=(S1−S2)g ⇒ m = 30 kg

The correct option is B
30 kg

$m (g + a) = (S_{1} - S_{2}) g$

$\Rightarrow$ m = 30 kg