A boy can exert a maximum effort of $250 N$ , so he uses an inclined plane to lift the load up. What should be the minimum length of the plank used by him to lift a mass of $50 k g$ to a height of $1 m$ ?

2

m

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5

m

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25

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6

m

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Solution

The correct option is A $2$ $m$
Work done $W = m g h$
$W = 50 \times 10 \times 1$ $N$
$W = 500 N$
$W =$ Effort $\times$ distance
Distance $= 500 / 250 = 2 m$

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A boy can exert a maximum effort of 250 N, so he uses an inclined plane to lift the load up. What should be the minimum length of the plank used by him to lift a mass of 50 kg to a height of 1 m ?

The correct option is A 2 mWork done W=mghW=50×10×1 NW=500NW= Effort × distanceDistance=500/250=2m

A boy can exert a maximum effort of $250 N$ , so he uses an inclined plane to lift the load up. What should be the minimum length of the plank used by him to lift a mass of $50 k g$ to a height of $1 m$ ?

The correct option is A $2$ $m$
Work done $W = m g h$
$W = 50 \times 10 \times 1$ $N$
$W = 500 N$
$W =$ Effort $\times$ distance
Distance $= 500 / 250 = 2 m$