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प्रश्न
What is the work done by the moon when it revolves around the earth?
उत्तर
Work done = Force × Displacement
संबंधित प्रश्न
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?
State two factors on which the work done on a body depends.
What are the two kinds of mechanical energy?
.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.
Draw a neat labeled diagram to show the direction of two forces acting on a body to produce rotation in it. Also mark the point about which rotation takes place.
Explain the difference between a uniform linear motion and a uniform circular motion.
Give two examples of work done.
A cricket ball is thrown up from the earth's surface. What happens to its P.E.
(a) during the motion
(b) at the highest point?
Name the physical quantity associated with the 'rate of doing work'.
A block of mass 20 kg is pulled up a slope (fig.12) with a constant speed by applying a force of 500 N parallel to the slope. A and B are initial and final positions of the block.
(a) Calculate the work done by the force in moving the block from A and B.
(b) Calculate the potential energy gained by the block.
State the energy changes which take place when An electric bulb glows when it is connected to a source of electric current.
Define Translational motion.
Can two agents, doing the same work, have different power?
The weights of two bodies are 2.0 N and 2.0 kgf respectively what is the mass of each body?
Who is the odd one out?
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
Suma is swimming in a pond.
