Chapters
Balbharati SCC Class 10 Science and Technology part 1
Chapter 1 : Gravitation
Pages 14  15
Study the entries in the following table and rewrite them putting the connected items in a single row.
I  II  III 
Mass  m/s^{2}  Zero at the centre 
Weight  kg  Measure of inertia 
Acceleration due to gravity

Nm^{2}/kg^{2}  Same in the entire universe 
Gravitational constant  N  Depends on height 
Answer the following question.
What is the difference between mass and weight of an object. Will the mass and weight of an object on the earth be same as their values on Mars? Why?
Answer the following question
What are (i) free fall, (ii) acceleration due to gravity (iii) escape velocity (iv) centripetal force ?
Answer the following question
A stone thrown vertically upwards with initial velocity u reaches a height ‘h’ before coming down. Show that the time taken to go up is same as the time taken to come down.
Answer the following question
Write the three laws given by Kepler. How did they help Newton to arrive at the inverse square law of gravity?
Answer the following question
If the value of g suddenly becomes twice its value, it will become two times more difficult to pull a heavy object along the floor. Why?
Explain why the value of g is zero at the centre of the earth.
Let the period of revolution of a planet at a distance R from a star be T. Prove that if it was at a distance of 2R from the star, its period of revolution will be \[\sqrt{8}\]
Solve the following example
An object takes 5 s to reach the ground from a height of 5 m on a planet. What is the value of g on the planet?
Solve the following example
The radius of planet A is half the radius of planet B. If the mass of A is M_{A}, what must be the mass of B so that the value of g on B is half that of its value on A?
Solve the following example
The mass and weight of an object on earth are 5 kg and 49 N respectively. What will be their values on the moon? Assume that the acceleration due to gravity on the moon is 1/6th of that on the earth.
Solve the following example
An object thrown vertically upwards reaches a height of 500 m. What was its initial velocity? How long will the object take to come back to the earth? Assume g = 10 m/s^{2 }
Solve the following example
The masses of the earth and moon are 6 × 10^{24} kg and 7.4 × 10^{22} kg, respectively. The distance between them is 3.8 × 10^{5} km. Calculate the gravitational force of attraction between the two? Use G = 6.7 × 10^{–11} N m^{2} kg^{–2}
Solve the following example
The mass of the earth is 6 × 10^{24} kg. The distance between the earth and the sun is 1.5 × 10^{11} m. If the gravitational force between the two is 3.5 × 10^{22} N, what us the mass of the sun? Use G = 6.7 × 10^{–11 }N m^{2} kg^{–2}
Balbharati SCC Class 10 Science and Technology part 1
Textbook solutions for Class 10th Board Exam
Balbharati solutions for Class 10th Board Exam Science and Technology  1 chapter 1  Gravitation
Balbharati solutions for Class 10th Board Exam Science and Technology  1 chapter 1 (Gravitation) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, stepbystep solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the Maharashtra State Board SCC Class 10 Science and Technology part 1 solutions in a manner that help students grasp basic concepts better and faster.
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Concepts covered in Class 10th Board Exam Science and Technology  1 chapter 1 Gravitation are Escape velocity, Gravitational Potential Energy, Concept of Free Fall, Mass and Weight, Variation in Value of g, Earth’s Gravitational Acceleration, Newton’s Universal Law of Gravitation, Kepler’S Laws, Centripetal Force, Circular Motion, Gravitation.
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