Advertisements
Advertisements
Questions
state the unit of energy.
Advertisements
Solution
The SI unit of work is ‘joules’ and the CGS unit is ‘erg’.
RELATED QUESTIONS
Power spent by a body depends on the time for which it does work.
Work done = Force × ........................................
A weight lifter lifted a load of 200 kgf to a height of 2.5 m in 5 s. Calculate:
- the work done, and
- the power developed by him. Take g = 10 N kg-1
State the law of conservation of energy.
What is the work done against gravity when a body is moved horizontally along a frictionless surface?
When you move upstairs, do you perform some work?
What do you understand by the term energy? Is energy a scalar or vector? How is the energy possessed by a body measured?
If a ball is dropped on the sloping roof of a house, it acquires ______ and falls on the ground. That is the transformation of ______ energy into ______ energy takes place.
(kinetic, potential, motion)
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
A wind-mill is lifting water from a well.
