Advertisements
Advertisements
Question
Define 1 joule of work.
Advertisements
Solution
Joule is the SI unit of work. Work done is said to be of 1 Joule when a force of 1 Newton moves a body by 1 m along the direction of the force applied.
RELATED QUESTIONS
The S.I. unit of work is
The moon is revolving around the earth in a circular path. How much work is done by the moon?
Write the expression for work done by a force.
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)
State the law of conservation of energy.
Fill in the blank with suitable word :
Work is measured as a product of __________ and __________
What are the quantities on which the amount of work done depends? How are they related to work?
What is the ratio of SI units to CGS units of 'work'?
An object is dropped from a height H. when is its
(i) P.E. maximum,
(ii) K.E. maximum,
(iii) P.E. = K.E.?
Name the CGS unit of work.
A boy pulls a box up to 10 m with a force of 5 kgf. Calculate the work done by him.
An electric motor pump is 60% efficient and is rated 2.5 H.P. Calculate the maximum load it can lift through a height of 10m in 8 sec. (1 H.P. = 750 W).
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.
State whether work is done or not, by writing yes or no, in the following case:
A man pushes a wall.
