Calculation of Work Done
Calculation of Work Done
Calcualtion of the Work Done: The work done by a body is the product of the force and displacement in the direction of force
W = F. s cos
Where, F = Force is equal to force applied
s = dispalcement of the body
cos = cosine value of the angle between force and displacement or the direction of motion
Q. A body of mass 2 kg is raised to a height of 1m. Find the work done by the force of gravity?
Solution: The force of gravity on the body, is the force exerted by earth on it = mg acting vertically downward.
However the displacement s = 1m vertically upwards
The angle between Force of Gravity and Direction of Motion
Now from W = Fs cos = mgcos
W = 2 x 9.8 x 1 x cos
= - 19.6 J ( cos
= -1)
Q. A force of 10 N displaces by 5 m, the angle between force and displacement is , then find the work done.
Solution: F = 10N, s = 5 m
Angle between force and displacement ,
Work done, W =Fd cos = 10 x 5 x cos
W = 25 J
How much work is done by a force of 10 N in moving an object through a distance of 5 m in the direction opposite to the force? | |||
| Right Option : C | |||
| View Explanation | |||
If force and displacement of particle in direction of force are doubled. Work would be | |||
| Right Option : B | |||
| View Explanation | |||
A car weighing 500 kg. working against a resistance of 500N, accelerates from rest to 20m/s in 100m. | |||
| Right Option : B | |||
| View Explanation | |||
Students / Parents Reviews [10]
My experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
Hiya Gupta
8thA marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
Archit Segal
7thBeing a parent, I saw my daughter improvement in her studies by seeing a good result in all day to day compititive exam TMO, NSO, IEO etc and as well as studies. I have got a fruitful result from my daughter.
Prisha Gupta
8thIt 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.
Eshan Arora
8thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Manish Kumar
10thMy experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
Ayan Ghosh
8thOne of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
Aman Kumar Shrivastava
10thAbhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
Om Umang
10thIt has a great methodology. Students here can get analysis to their test quickly.We can learn easily through PPTs and the testing methods are good. We know that where we have to practice
Barkha Arora
10thMy experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
