Science_part_ _i_(solutions) Solutions for Class 10 Science Chapter 1 Gravitation are provided here with simple step-by-step explanations. Extra Questions for Class 9 Science Chapter 10 Gravitation with Answers Solutions . F=GMeMmR2 NCERT Books chapter-wise Solutions (Text & Videos) are accurate, easy-to-understand and most helpful in … State the universal law of gravitation. Using all the given values, we have The value of acceleration due to gravity on the surface of the earth at sea level is (a) 4.9 m/s 2 (b) 6 m/s 2 (c) 8 m/s 2 (d) 9.8 m/s 2 Answer. An object takes 5 s to reach the ground from a height of 5 m on a planet. d. For vertical upward motion of the object, Now, when the distance of the planet from the star is 2R, then its period of revolution becomes Gravitation | Physics | MCQ - Multiple Choice Questions | CBSE Class 9th Question 1. Download PDF of NCERT Exemplar for Class 9 Science Chapter 10 – Gravitation . NCERT Exemplar Class 11 Physics is very important resource for students preparing for XI Board Examination. Assume that the acceleration due to gravity on the moon is 1/6th of that on the earth. At half-way down, the potential energy of the object will be, How did they help Newton to arrive at the inverse square law of gravity? After you have studied lesson, you must be looking for answers of its questions. Chapter 12 - Sound. What is the centripetal force that makes moon revolve around earth? f. The masses of the earth and moon are 6 × 1024 kg and 7.4 × 1022 kg, respectively. You will also love the ad-free experience on Meritnation’s Science_part_ _i_(solutions) Solutions. Will the mass and weight of an object on the earth be same as their values on Mars? Using all the given values, we have From third equation of motion, we have How long will the object take to come back to the earth? This is given as: This object was carried to the moon. Further, we at Shaalaa.com provide such solutions so that students can prepare for written exams. Since, mass m of an object can never be 0. Gravitation multiple choice questions (MCQs), gravitation quiz answers pdf 10, learn physics online courses. (b) 60 kg. Since the mass m of a planet is constant, equation (i) can be written as: Thus, the value of g is zero at the centre of Earth. Chapter 10. The mass of a body remains the same everywhere in the universe. WM=16WE⇒WM=496=8.17 N  For vertical downward motion of the stone: If the mass of A is MA, what must be the mass of B so that the value of g on B is half that of its value on A? e. Let the mass of the heavy object be m. Thus, the weight of the object or the pull of the floor on the object is Thus a big stone will fall with the same acceleration as a small stone. Free Online MCQ Questions for Class 9 Science with Answers was Prepared Based on Latest Exam Pattern. 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. F∝1r2 v = 0 a. 1. b. All questions and answers from the Science_part_ _i_(solutions) Book of Class 10 Science Chapter 1 are provided here for you for free. Dividing (iii) by (ii), we get Hence, from (i) and (ii), we observe that the time taken by the stone to go up is same as the time taken by it to come down. The students should read these basic concepts to gain perfection which will help him to get more marks in CBSE Let t2 be the time taken by the object to come back to the Earth from height of 500 m. What  are (i) free fall, (ii) acceleration due to gravity (iii) escape velocity (iv) centripetal force ? If the mass of A is MA, what must be the mass of B so that the value of g on B is half that of its value on A? All Science_part_ _i_(solutions) Solutions for class Class 10 Science are prepared by experts and are 100% accurate. e. A ball falls off a table and reaches the ground in 1 s. Assuming g = 10 m/s2, calculate its speed on reaching the ground and the height of  the table. T2∝R3 .....(ii) where, Me and Mm are the masses of the Earth and the Moon, respectively. Study the entries in the following table and rewrite them putting the connected items in a single row. Questions : 1. Page No: 134. Thus, the mass of planet B should be twice that of planet A. F=GMeMsR2 Thus, from second equation of motion, we have How did they help Newton to arrive at the inverse square law of gravity? Name the force which is responsible for the revolution of planets around the sun. v = 0 A ball falls off a table and reaches the ground in 1 s. Assuming g = 10 m/s2, calculate its speed on reaching the ground and the height of the table. f. The gravitational force between the Moon and the Earth can be found out using the formula, What is the difference between mass and weight of an object? 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T12∝(2R)3orT12∝8R3 .....(iii) TopperLearning’s Experts and Students has answered all of Gravitation of MAHARASHTRA Class 10 Physics questions in detail. Hence the mass reading of 42 kg given by a weighing machine is same as the actual mass of the body. S=ut+12at2⇒500=102×t22⇒t2=10 s      u = 0 F=(6.7×10-11)(6×1024)(7.4×1022)(3.8×105×1000)2=20.6×1019≃2×1020 N Since, from Newton's law, we know S = 5 m g. The mass of the earth is 6 × 1024 kg. Show that the time taken to go up is same as the time taken to come down. Gravitation Class 9 Extra Questions Very Short Answer Type. Thus, Thus, the total time taken by the object to reach back to Earth = t1 + t2 = 20 s Why? The mass of a body can be measured using a beam balance and a pan balance. S = 500 m Both the bodies fall with the same acceleration towards the surface of the earth. Therefore, when F = 0, g has to be 0. 134. Visit the below link to get free NCERT Exemplar for Class 9 Science Chapter 9. S = h This document is highly rated by Class 9 students and has been viewed 414 times. v2 ∝ 1/ r...(vii) Assume g = 10 m/s2. Balbharati solutions for Science and Technology Part 1 10th Standard SSC Maharashtra State Board chapter 1 (Gravitation) include all questions with solution and detail explanation. Thus, when the period of revolution of planet at a distance R from a star is T, then from (i), we have Gravity is also known as gravitation which is a force of attraction that acts between all the matter. Shaalaa.com has the Maharashtra State Board Science and Technology Part 1 10th Standard SSC Maharashtra State Board solutions in a manner that help students grasp basic concepts better and faster. Let t' be the time taken by the ball to reach the ground. e. Here, t =1 s The radius of planet A is half the radius of planet B. QUESTION 1 (1995 EXAM) (a) State Newton’s Universal Law of Gravitation in words (3 marks) (b) A satellite of mass (m) moves in orbit of a planet with mass (M). 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 \[\sqrt{8}\] T. An object takes 5 s to reach the ground from a height of 5 m on a planet. Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 11.. For vertical downward motion of the object, From second equation of motion, we have The mass of an object is 60 kg on the earth. Use G = 6.7 × 10–11 N m2 kg–2 Assume g = 10 m/s2 where, Me and Ms are the masses of the Earth and the Sun, respectively. The mass of moon is about 0.012 times that of the earth and its […] This will clear students doubts about any question and improve application skills while preparing for board exams. Gravitation quiz questions and answers pdf, objects scintists sent to space and they revolves around earth are termed as, to practice for physics certifications. Why? For planet B: gB=GMBrB2 The distance between the earth and the sun is 1.5 × 1011 m. If the gravitational force between the two is 3.5 × 1022 N, what is the mass of the sun? Maximum students of Maharashtra State Board 10th Standard [इयत्ता १० वी] prefer Balbharati Textbook Solutions to score more in exam. The Following Section consists of Gravitation Questions on Physics. (a) Gravitational Force (b) Electrostatic Force (c) Magnetic Force (d) None. On using equation (vii) in equation (ii), we get: g = 10 m/s2 On squaring both sides of this equation, we get: Questions : 1. Weight is an extrinsic property of a body. What is the difference between mass and weight of an object. W = mg T2∝r3 .....(i) Mass of the object on Moon = 5 kg  (since mass is independent of the place of observation) Study the entries in the following table and rewrite them putting the connected items in a single row. The mass of an object is the measure of its (a) pressure. At the centre of Earth, the force due to upper half of the Earth will cancel the force due to lower half. Take the Quiz and improve your overall Physics. b.The radius of planet A is half the radius of planet B. This will clear students doubts about any question and improve application skills while preparing for board exams. Free PDF download of Important Questions with solutions for CBSE Class 9 Science Chapter 10 - Gravitation prepared by expert Science teachers from latest edition of CBSE(NCERT) books. Weight is the force exerted on a body due to the gravitational pull of another body such as Earth, the sun and the moon. Using Balbharati 10th Standard [इयत्ता १० वी] solutions Gravitation exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. F = mv2/ r ...(i) where, m is the mass of the particle, r is the radius of the circular path of the particle and v is the velocity of the particle. From second equation of motion, we have Explain why the value of g is zero at the centre of the earth. v = u + gt Register online for Science tuition on Vedantu.com to score more marks in your examination. c. Mass of the object on Earth, m = 5 kg Use G = 6.7 × 10–11 N m2 kg–2, a. (d) 100 N. 3. On multiplying and dividing the right-hand side of this relation by r, we get: v2∝r3T2×1r ...(vi) ​2gh=v'2⇒v'=2ghNow, from first equation of motion, we havev'=u+gt't'=v'g=2hg    .....(ii) Gravitation Objective GK Questions and Answers. (c) inertia. 2. Download free printable assignments worksheets of English from CBSE NCERT KVS schools, free pdf of CBSE Class 10 English Grammar Questions chapter wise important exam questions and answers CBSE Class 10 English Grammar Questions . Here, u = 0  A collection of questions on CBSE-Gravitation with solutions created by best teachers are available as a PDF download. (d) thrust. 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