Advertisements
Advertisements
प्रश्न
A boy does work when he pushes against a brick wall. (yes/no).
Advertisements
उत्तर
Yes
APPEARS IN
संबंधित प्रश्न
Soni says that the acceleration in an object could be zero even when several forces are acting on it. Do you agree with her? Why?
An electron emitter must have _____________ work function and ___________ melting point.
State the S.I. unit of work and define it.
A body, when acted upon by a force of 10 kgf, moves to a distance 0.5 m in the direction of force. Find the work done by the force. Take 1 kgf = 10 N.
Differentiate between energy and power.
What is the condition for a force to do work on a body?
Complete the following sentences:
The SI unit of work is ....... and of power is .......
A coolie, with a load of 30 kg on his head, walks on the platform. If he walks a distance of 60 m, what is the work done by him?
What is power? How do you differentiate kilowatt from kilowatt-hour? The Jog Falls in Karnataka state are nearly 20 m high. 2000 tonnes of waterfalls from it in a minute. Calculate the equivalent power if all this energy can be utilized? (g = 10 m s–2)
State whether work is done or not, by writing yes or no, in the following case:
A boy climbs up 20 stairs.
