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प्रश्न
Nm is the unit of .......
उत्तर
Work
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संबंधित प्रश्न
Define 1 J of work.
What is the work done by the moon when it revolves around the earth?
Work is said to be done by a forte only when ................
Define work.
When does a force perform work?
State two factors on which the work done on a body depends.
Define 1 joule of energy.
When is work said to be done by a force?
.A man raises a box of mass 50kg to a height of 2m in 20s, while another man raises the same box to the same height in 50s. Compare:
(i) the work done, and
(ii) the power developed by them.
State two disadvantages of producing hydroelectricity.
How much work is done when a body of mass m is raised to a height h above the ground?
What is the condition for a force to do work on a body?
A girl weighing 400 N climbs a vertical ladder. If the value of g be 10 m s−2, the work by her after climbing 2 m will be :
An electric motor drives a machine which lifts a mass of 4 kg through a height of 10 m in 5 s at a constant speed. Assuming g = 10 ms-2, calculate
(i) the amount of work done, (ii) the power of the machine.
Calculate the amount of work done by a child carrying a bag of 20 kg when he moves a distance of 40 m in
(a) Vertical direction, and
(b) Horizontal direction
Fill in the boxe to show the corresponding energy transformation.
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
Food grains are getting dried in the sun.
