Welcome to cbsenotes.com! To post messages or access any member only section, you will need an account. Create your free account now.
Already a member ? Click here to login
CBSE Notes 2011-2012 » IX-Science-Term2

Work and Energy

If 1 newton of force displaces a body by 1 m, the work done is

Multiple choice question

If 1 newton of force displaces a body by 1 m, the work done is

On tripling the speed of motion of a body, the change in K.E. is

Multiple choice question

On tripling the speed of motion of a body, the change in K.E. is

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.)

A bullet entering a metal block of 30 cm length stops on reaching 25 cm. The energy with the bullet ...

Multiple choice question

A bullet entering a metal block of 30 cm length stops
on reaching 25 cm. The energy with the bullet will be lost

If a 60 W bulb and a 40 W bulb are connected to a source of 220 V potential, the bulb glowing bright...

Multiple choice question

If a 60 W bulb and a 40 W bulb are connected to a
source of 220 V potential, the bulb glowing brighter is

Syndicate content