Mass and Weight
Mass and Weight
Weight: of an object is the force with which it is attracted towards the Earth. Weight of an object, w = mg, where, m = mass, g = acceleration due to gravity.
Here, M = mass of the earth and R radius of the earth
From the above formula, it is clear that weight of an object will change on a planet other than the earth. Spring balance is used to measure the weight of a body and pan balance is used to measure the mass of a body.
Important points regarding weight are as follow:
Weight of an Object on the Moon: Let the mass of an object be ‘m’ and its weight on the moon be . Suppose the mass of the moon is ‘M’ and its radius be ‘R’. According to universal law of gravitation, the weight of an object on the moon will be
Let the weight of the same object on the earth be . But the mass of the earth is 100 times that of the moon and the radius of the earth is 4 times that of the moon. Weight of the object on the earth,
On dividing these equations,
Thus, the weight of an object on the moon is one-sixth of its weight on the earth.
Q. A person's mass happens to be 70 kg, while the gravity on Earth is . Find out the weight of this person?
Solution: Here, mass(m) = 70 kg and g =
As we know that weight Therefore,
Hence, the weight of the person = 686 N
Q. Conisder a heavenly body whose mass is twice that of the earth and whose radius is thrice that of the earth.What will be the weight of a book on this heavenly body, if its weight on the earth is 900 N ?
Solution: The weight of the book on the earth is
If weight on the heavenly body is
Thus,
or
Identify the correct statement. | |||
| Right Option : A | |||
| View Explanation |
___________________ of an object is the force with which it is attracted towards the Earth. | |||
| Right Option : B | |||
| View Explanation | |||
Which of the following are correct : (a) Weight of an object is the force with which it is attracted towards the Earth. (b) Weight of an object is not constant; it changes from place to place. (c) Weight of an object is constant; it cannot changes from place to place. | |||
| Right Option : A | |||
| View Explanation | |||
Students / Parents Reviews [20]
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.
Shreya Shrivastava
8thThe experience was nice. I studied here for three years and saw a tremendous change in myself. I started liking subjects like English and SST which earlier I ran from. Extra knowledge gave me confidence to overcome competitive exams. One of the best institutes for secondary education.
Aman Kumar Shrivastava
10thOne 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
10thMy experience with Abhyas Academy has been very good. When I was not in Abhyas whenever teacher ask questions I could not speak it confidently but when I came in Abhyas, my speaking skills developed and now I am the first one to give the answer of teachers question.
Upmanyu Sharma
7thIt 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
8thMy 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
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.
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10thI 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
Yatharthi Sharma
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Prisha Gupta
8thWhen I have not joined Abhyas Academy, my skills of solving maths problems were not clear. But, after joining it, my skills have been developed and my concepts of science and SST are very well. I also came to know about other subjects such as vedic maths and reasoning.
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7thAbhyas 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...
Shreya Shrivastava
8thUsually we see institutes offering objective based learning which usually causes a lag behind in subjective examinations which is the pattern followed by schools. I think it is really a work of planning to make us students grab the advantages of modes of examination, Objective Subjective and Onli...
Anika Saxena
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
7thWe started with lot of hope that Abhyas will help in better understnding of complex topics of highers classes. we are not disappointed with the progress our child has made after attending Abhyas. Though need to mention that we expected a lot more. On a scale of 1-10, we would give may be 7.
Manya
8thMy 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
8thIn terms of methodology I want to say that institute provides expert guidence and results oriented monitering supplements by requsite study material along with regular tests which help the students to improve their education skills.The techniques of providing education helps the students to asses...
Aman Kumar Shrivastava
10thMy experience with Abhyas academy is very nice or it can be said wonderful. I have been studying here from seven class. I have been completing my journey of three years. I am tinking that I should join Abhyas Academy in tenth class as I am seeing much improvement in Maths and English
Hridey Preet
9thAbhyas 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...
Aman Kumar Shrivastava
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Om Umang
10thAbhyas academy is great place to learn. I have learnt a lot here they have finished my fear of not answering.It has created a habit of self studying in me.The teachers here are very supportive and helpful. Earlier my maths and science was good but now it has been much better than before.
