4. Why do different planets have different escape velocities? (g) The gravitational force on a body due to the Earth is equal and opposite to the gravitational force on the Earth due to the body. 6.2: The Newtonian idea of gravitational force acting between two spherical bodies and the laws of mechanics create a model that can be used to calculate the motion of planets. Comment. question_answer58) Can we determine the gravitational mass of a body inside an artificial satellite? question_answer20) Why is centre of mass of a body often called its centre of gravity? Why? question_answer73) Which of the following observations point to the equivalence of inertial and gravitational mass: (a) Two spheres of different masses dropped from the top of a long evacuated tube reach the bottom of the tube at the same time. Give reason for your answer. In CBSEGuess you can download CBSE Board Papers from the archies of 50K CBSE Sample Papers, Guess Papers and Question Bank. Why ? NEET Physics - Mini Question Bank Gravitation questions & solutions with PDF and difficulty level Attention Class IX standard Aspirants! | NCERT Books. Question 1. (a) What do you understand by the term ‘acceleration due to gravity of earth’ ? When a satellite moves to a lower orbit in the atmosphere of the earth, it becomes hot. Gravitation Class 9 Notes introduces the concept of gravity, which is basically a force that attracts a body towards to centre of another physical body that has mass . This question bank is designed by NCERT keeping NCERT in mind and the questions are updated with respect to upcoming Board exams. Solved Papers Motion of Satellite. FAQ But bodies on the surface of earth never move towards each other on account of this force of attraction. What will happen to the debris? | Everyone knows that the moon orbits the Earth because of a gravitational force. Join our Telegram Channel too for updates. 0. In this chapter, you shall learn primarily about the concepts of Gravitation, the Laws of Gravitation and the way an object's motion is influenced on being acted upon by Gravitation. The distance between two bodies A and B is r. Taking the gravitational force according to the law of inverse square of r, the acceleration of the body is a. Give reason for your answer. IIT JEE : Gravitation QUESTIONS AND ANSWERS :: part1 : 1 to 5. If the satellite is launched at an angle of \[\mathbf{60}{}^\circ \] with the vertical, what will be the escape velocity? question_answer4) If spheres of same material and same radius r are touching each other, then show that the gravitational force between them is directly proportional to \[{{r}^{\mathbf{4}}}\]. Question5: Why is gravitational force the most important force ? Which of the two will touch the ground first ? Choose the correct alternatives : (i) If the gravitational potential energy of two mass points infinite distance away is taken to be zero, the gravitational potential energy of a galaxy is (positive/negative/zero). (G = 6.67 × 10-11 Nm 2 kg-2) Solution: Given, m 1 = m 2 = 15 kg d = 2 m G = 6.67 × … If the force of gravity acts on all bodies in proportion to their masses, why does a heavy body not fall faster than a light body? Edit. Does the weightlessness depend upon the distance of the satellite from the earth? But the satellite spirals down towards the earth with an increasing speed, why? 4. The weight of a body is less inside the earth than on the surface. Assertion and Reason. According to Albert Einstein, no particle can have velocity equal to or greater than that of light. Find their gravitational pull. Â (a) Define mass of a body. Advertisement Remove all ads. So far we have discussed various forces: Pushes and pulls, elastic forces, friction and other forces that act when one body is in contact with another. What will happen to the debris? 10.2: Similar approaches can be taken in analysing electrical and gravitational potential problems. question_answer60) Why an astronaut in an orbiting space-craft is not in zero gravity although weightless? question_answer77) When a satellite moves to a lower orbit in the atmosphere of the earth, it becomes hot. 1st PUC Physics Question Bank Chapter 8 Gravitation February 12, 2020 November 2, 2020 / By Prasanna Students can Download Physics Chapter 8 Gravitation Questions and Answers, Notes Pdf, 1st PUC Physics Question Bank with Answers helps you to revise the complete Karnataka State Board Syllabus and to clear all their doubts, score well in final exams. A satellite is orbiting the earth with speed \[{{\upsilon }_{0}}\] to make the satellite escape, what should be the minimum percenta8ge increase in its velocity? QUESTION BANK. If the separation between the earth and the satellite is increased to 4 times the previous value, then what will be the new time period of the satellite? Why? For questions of other topics of Physics, use the button given at the bottom of this page. Question Bank Solutions 6029. (Gravitational Constant, G = 6.7 X 10-11 Nm2 Kg-2) CBSE CBSE Class 9. (d) For a man in closed cabin that is falling freely under gravity, gravity 'disappears'. Why does a tennis ball bounce higher on a hill than on plains? The value of g does not depend on the mass of the body. Free PDF download of Important Questions with solutions for CBSE Class 11 Physics Chapter 8 - Gravitation prepared by expert Physics teachers from latest edition of CBSE(NCERT) books. NEET help on Whatsapp Chat. Define : gravitation, gravity and gravitational force. question_answer14) Which is more fundamental-mass or weight of a body? Class 9 students definitely take this MCQ : Gravitation - 1 exercise for a better result in the exam. Question bank; Class XI; Physics; Gravitation; Quiz Details; Class/Course - Class XI Subject - Physics Chapter - Gravitation. Gravitation Worksheet-10 Â Which is more fundamental, the mass of a body or its weight ? question_answer13) Does the gravitational force of attraction of the earth become zero at some height above the earth? question_answer84) Why does the earth impart the same acceleration to all bodies? (d) For a man in closed cabin that is falling freely under gravity, gravity 'disappears'. Get here all the important questions of Class 11 students definitely take gravitation question bank MCQ: Gravitation 1. Equal speeds in the equatorial plane 12 ; CBSE ) an astronaut in orbit! 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