MEDIUM
9th CBSE
IMPORTANT
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An elevator with load, weighing 500 kg is moving up with a velocity of 0.2 m s-1. The power of the motor in horsepower is (1 H.P.=746 watt, g=9.8m/s2)

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Important Questions on Work and Energy

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9th CBSE
IMPORTANT
A stone rubbed on a rough floor and placed on the skin will show heating sensation, because
MEDIUM
9th CBSE
IMPORTANT
In the figure shown, a mass comes from A to C there will be
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9th CBSE
IMPORTANT
A mass m is used to compress a spring fixed on a high-rise platform. Then
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EASY
9th CBSE
IMPORTANT
(i) Falling coconut : Kinetic energy
(ii) Stone on tower : _____
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9th CBSE
IMPORTANT
Which one of the following is not the unit of energy?
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9th CBSE
IMPORTANT
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EASY
9th CBSE
IMPORTANT
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MEDIUM
9th CBSE
IMPORTANT
A body is falling from a height h. After it has fallen a height h2, it will possess