Work
Work
Work: The word ‘work’ has many different meanings. In physics, however, it has a special meaning. When a force acts on an object moves, we say that the force has one work on the object.
When an apple falls from a tree, the force of attraction of the earth does work on the apple. Work is always done by a force. The work done by a force acting on an object to equal to the product of the force and the displacement of the object in the direction of the force. We assume here that the force remains constant during the whole displacement. Note that both force and displacement have directions, i.e., they are vectors. Work, which is a product of force and displacement, does not have a direction. It is a scalar quantity.
Work Done = Force X Displacement
Q. A force of 10 N causes a displacement of 2m in a body in its own direction. Calculate the work done by the force .
Solution : The work done by the force W = F x s = 10 N x 2 m = 20 J
Q. How much force is applied on the body when 150 joule of work is done in displacing the body through a distance of 10 m in the direction of force?Solution: Work done W = F x s
we can say that
A carton is pulled along the ground for a distance of 5 m. If the force of friction is 79 N, then the work done is | |||
| Right Option : D | |||
| View Explanation | |||
A car moving along a straight level road with constant speed. Then | |||
| Right Option : B | |||
| View Explanation |
A man pushes a wall but fails to displace it.He does __________________. | |||
| Right Option : C | |||
| View Explanation | |||
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It was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
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10thAbhyas institute is one of the best coaching institute in the vicinity of Ambala Cantt area. The teachers of the institute are well experienced and very helpful in solving the problems of the students.The good thing of the institute is that it is providing extra classes for the students who are w...
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10thAbhyas institute is one of the best coaching institute in the vicinity of Ambala cantt.The institute provides good and quality education to the students.The teachers are well experienced and are very helpful in solving the problems. The major advantages of the institute is extra classes for weak...
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8thAbout Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
