Advertisements
Advertisements
प्रश्न
Write the expression for work done by a force.
Advertisements
उत्तर
Work done by applying force F is the product of the force applied on the body and distance moved by the body in the direction of force, work done = Force x distance moved in the direction of the force.
W = F × d

संबंधित प्रश्न
Write an expression for the work done when a force is acting on an object in the direction of its displacement.
An object thrown at a certain angle to the ground moves in a curved path and falls back to the ground. The initial and the final points of the path of the object lie on the same horizontal line. What is the work done by the force of gravity on the object?
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.
A car is running at a speed of 15 km h-1 while another similar car is moving at a speed of 45 km h-1. Find the ratio of their kinetic energies.
Explain degradation of energy by taking two examples of your daily life.
Give one example in which a force does zero work.
The work done on an object does not depend on ______.
Complete the following sentences:
Kilowatt is the unit of ....... and kWh is the unit of
A machine raises a load of 750 N through a height of 16 m in 5s. calculate:
(i) work done by machine,
(ii) power at which the machine works.
Name the type of energy possessed by a
(i) stretched catapult (ii) hot iron
(iii) wound up clock
Is power a scalar or a vector quantity?
In what way does an ‘Ideal machine’ differ from a ‘Practical machine’?
Name two places in India where electricity is generated from nuclear power plants.
What is the difference between renewable and non-renewable resources?
A bucketful of water is to be drawn from a well ______ will be done when a ______ is applied to do this because there will be a ______ of water.
(displacement, work, force)
Who is the odd one out?
Work done by this force at any instant is ______.
