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
A ball of mass 1 kg thrown upwards reaches a maximum height of 5.0 m. Calculate the work done by the force of gravity during this vertical displacement. | |||
Right Option : C | |||
View Explanation |
Work done = Force | |||
Right Option : A | |||
View Explanation |
If force and displacement of particle in direction of force are doubled. Work would be | |||
Right Option : B | |||
View Explanation |
I have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
My 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.
It was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
One 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.
It 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
A 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.
About 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.
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.
My 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.
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.