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प्रश्न
Fill in the boxe to show the corresponding energy transformation.
उत्तर
Chemical energy ⇌ Electrical energy
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संबंधित प्रश्न
Work is said to be done by a forte only when ................
When is work said to be done by a force?
Express joule in terms of erg.
A force of 50 N acts on a body and moves it a distance of 4 m on horizontal surface. Calculate the work done if the direction of force is at an angle of 60° to the horizontal surface.
How much work is done by the gravitational force of earth acting on a satellite moving around it in a circular path? Give reason for your answer.
Each of the following statement describes a force acting. Which force is causing work to be done?
How many watts equal one horse power?
Define 'joule'.
Can every force produce work?
A body does 20 J of work in 10 s. What is its power?
List any six forms of energy and write a short note on each of them.
State the energy changes which take place when A piece of magnesium wire is burnt in a jar of oxygen.
Can two agents, doing the same work, have different power?
What do you understand by the term energy? Is energy a scalar or vector? How is the energy possessed by a body measured?
A coolie is pushing a box weighing 1500 N up an inclined plane 7.5 m long on to a platform, 2.5 m above the ground.
(i) Calculate the mechanical advantage of the inclined plane. (ii) Calculate the effort applied by the coolie.
(iii) In actual practice, the coolie needs to apply more effort than what is calculated. Give one reason why you think the coolie needs to apply more effort.
State whether work is done or not, by writing yes or no, in the following case:
A man pushes a wall.
