Advertisements
Advertisements
Question
On what factors does the work done by a force depend?
Solution
Work done depends upon:
(i) the magnitude and direction of the applied force, and
(ii) the displacement it produces.
APPEARS IN
RELATED QUESTIONS
A force acts on a body and displaces it by a distance S in a direction at an angle θ with the direction of the force. What should be the value of θ to get the maximum positive work?
When does a force perform work?
In which of the following cases is work being done:
- A boy pushing a heavy rock
- A boy climbing up the stairs
- A coolie standing with a box on his head
- A girl moving on the road.
A coolie is moving on a road with a luggage on his head. Does he perform work against the force of gravity? Give reason for your answer.
The moon is revolving around the earth in a circular path. How much work is done by the moon?
State the S.I. unit of work and define it.
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)
Define 1 joule of work.
The work done by a force acting obliquely is given by the formula : W = F cos θ ✕ s. What will happen to the work done if angle θ between the direction of force and motion of the body is increased gradually? Will it increase, decrease or remain constant.
Name five appliances or machines which use an electric motor.
Why is the work done on an object moving with uniform circular motion zero?
The work done on an object does not depend on ______.
Nm is the unit of .......
Is power a scalar quantity?
Define energy and state the unit of energy and the law of conservation of energy.
Name the material commonly used for the manufacturing of solar cells.
Force acting on a particle moving in a straight line varies with the velocity of the particle v as F = `K/v`, where K is a constant. The work done by this force in time t is