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CBSE Notes 2011-2012 » IX-Science-Term2

Work and Energy

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.

(i) Falling coconut : Kinetic energy (ii) Stone on tower :_______________

Multiple choice question

(i) Falling coconut : Kinetic energy
(ii) Stone on tower :_______________

When non-zero force and displacement are observed with zero work done, the angle between the force a...

Multiple choice question

When non-zero force and displacement are observed
with zero work done, the angle between the force
and displacement is __________.

60 W means that the device will use 60 joule of energy in hour.

Multiple choice question

60 W means that the device will use 60 joule of
energy in hour.

A. We do not work as we push a wall. B. A raised hammer can deliver more kinetic energy. C. Solar en...

Multiple choice question

A. We do not work as we push a wall.
B. A raised hammer can deliver more kinetic energy.
C. Solar energy is a form of hydal energy

A. Streched bow has potential energy. B. Catapult has kinetic energy.

Multiple choice question

A. Streched bow has potential energy.
B. Catapult has kinetic energy.

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