Advertisements
Advertisements
Question
State the C.G.S. unit of work. How it is related to its S.I. unit?
Advertisements
Solution
The C.G.S. unit of work is erg. 1 erg = 1 dyne × 1 cm.
The S.I. unit of work is the joule. 1 joule = 1 Newton × 1 metre
Relationship: 1 J = 1 N × 1 m
= 105 dyne × 100 cm = 107 erg.
RELATED QUESTIONS
State and define the S.I. unit of work.
How is kilowatt hour related to joule?
One horse power is equal to ______.
State the factors on which moment of force about a point depends.
What do you understand by work? Is work a scalar or a vector quantity?
State the condition when the work done by the force is negative.
A force F when acts on a body, displace it by a distance d in a direction at an angle θ with the direction of the force. Write down the expression for the work done by the force.
State two conditions for work to be done.
A coolie carrying a load on his head and moving on a frictionless horizontal platform does no work. Explain the reason why.
A coolie carries a load of 30 kgf through a distance of 500 m in 5 minutes while another coolie B carries the same load through the same distance in 10 minutes. Compare the
(i) work done, and
(ii) power developed. (Take: g = 10md−2)
