Advertisements
Advertisements
प्रश्न
Derive a relationship between S.I. and C.C.S. unit of work
उत्तर
SI unit of work = Nm(Joule)
CGS units of work = dyne-cm (erg)
`1 N = 10^5 "dyne"`
`1 m = 10^2 cm`
`:. 1 "Joule" = 10^5 xx 10^2 "dynecm" = 10^7 erg`
APPEARS IN
संबंधित प्रश्न
Define work.
What are the two kinds of mechanical energy?
1 J = ______ calorie.
A water pump raises 50 litres of water through a height of 25 m in 5 s. Calculate the power of the pump required.
(Take g = 10 N kg-1 and density of water = 1000 kg m-3)
Choose one or more correct alternatives.
Joule is the unit of ______.
- force
- work
- power
- energy
Draw a neat labeled diagram to show the direction of two forces acting on a body to produce rotation in it. Also mark the point about which rotation takes place.
Explain the difference between a uniform linear motion and a uniform circular motion.
What is the work done against gravity when a body is moved horizontally along a frictionless surface?
Is power a scalar quantity?
State the energy changes which take place when Water stored in the dam is used to turn turbine in dynamo.
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?
Explain, why submarines are able to dive underwater as well as a sail on the surface of the water?
A is a push or a pull ______.
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
A green plant is carrying out photosynthesis.
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
An engine is pulling a train.
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
Food grains are getting dried in the sun.
