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CBSE Notes 2011-2012 » IX-Science-Term2

Work and Energy

Water stored in a dam possesses

Multiple choice question

Water stored in a dam possesses

An elevator with load, weighing 500 kg is moving up with a velocity of 0.2 ms-1, The power of the mo...

Multiple choice question

An elevator with load, weighing 500 kg is moving
up with a velocity of 0.2 ms-1, The power of the
motor in horse power is (1 H.P. = 746 watt)

A stone rubbed on a rough floor and placed on the skin will show heating sensation, because.

Multiple choice question

A stone rubbed on a rough floor and placed on the
skin will show heating sensation, because.

A man holds and displaces a 20 kg mass horizontally in his stretched hand.

Multiple choice question

A man holds and displaces a 20 kg mass horizontally in his stretched hand.

Two masses m and 2m are dropped from certain height 'h'. Then on reaching the ground,

Multiple choice question

Two masses m and 2m are dropped from certain
height 'h'. Then on reaching the ground,

Two cars A and B approaching each other with momentum of 50 kg m/s and 25 kg m/s respectively, stick...

Multiple choice question

Two cars A and B approaching each other with
momentum of 50 kg m/s and 25 kg m/s respectively,
stick to each other after collision. The momentum
after the collision is

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