Advertisements
Advertisements
प्रश्न
State the C.G.S. unit of work. How it is related to its S.I. unit?
उत्तर
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.
APPEARS IN
संबंधित प्रश्न
How is kilowatt hour related to joule?
One horse power is equal to ______.
A body, when acted upon by a force of 10 kgf, gets displaced by 0.5 m. Calculate the work done by the force, when the displacement is (i) in the direction of force, (ii) at an angle of 60° with the force, and (iii) normal to the force. (g = 10 N kg-1)
A body of mass m is moving with a uniform velocity u. A force is applied on the body due to which its velocity changes from u to v. How much work is being done by the force?
What is meant by a rotatory motion? Give one example.
State the condition when a force produces
(i) linear motion.
(ii) rotational motion, in a body.
Name the force needed for circular motion. What is the direction of the force?
Give the units of couple.
The world record for weight lifting was held by Sergei Didyk of the USSR. He lifted 261 kg to a height of 2.3 m in 4s; find:
(a) Weight lifted by him
(b) Work done by him
(c) Power developed by him. (g = 10m/s2)
