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CBSE Notes 2011-2012 » IX-Science-Term2

Work and Energy

A mass is moving 5 m/s with speed of along the x-direction on a smooth surface, when a force of 5 N ...

Multiple choice question

A mass is moving 5 m/s with speed of along the x-direction on a smooth surface, when a force of 5 N acts on it along they-axis. The work done by against the force is

An electric bulb of 60 W burns for 5 hours a day. The cost of electricity involved in a month of 30 ...

Multiple choice question

An electric bulb of 60 W burns for 5 hours a day.
The cost of electricity involved in a month of 30 days
at Rs. 3.00 per unit is (in Rs.)

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