Here, mass of the moon on man, \(m = 70Kg\), Acceleration due to gravity on the moon \(1.63m. Q.18 What is the weight of a body of mass 1 kg? (11) A boy drops an iron ball and a feather from the top of a tower. (44) State the universal law of gravitation. (50) How does the force of gravitation between two objects change when the distance between them is reduced to half? A: 9.8 m-s2 It is proportional to the product of two masses and inversely proportional to the distance between two objects.. Also you can read about this topic from the given link where I have made a detail explanation about it. Ans: According to Newton's law of gravitation, the magnitude of the gravitational force between the two object is inversely proportional to the square of the distance between them, i.e. C: greater than rest object A: It depends on the mass of the body According to Newton's law of gravitation, the apple and the earth experience equal and opposite forces due to gravitation. (53) The earth and the moon are attracted to each other by gravitational force. The law of gravitation states that it depends on the masses of the objects and the distance between them. (63) A stone is thrown vertically upward with an initial velocity of 40 m/s. (32) A stone is released from the top of a tower of height 19.6 m. Calculate its final velocity just before touching the ground. Calculate (i) the velocity with which the ball was thrown up (ii) the maximum height attained by the ball and (iii) the distance of the ball below the highest point after 2 sec. Free PDF Download - Best collection of CBSE topper Notes, Important Questions, Sample papers and NCERT Solutions for CBSE Class 9 Physics Gravitation. B: The radius of the object The radius of the earth is 6400 km and g = 10 m/s². It means, weight of a body depends upon the value of 'g'. That is why this law is also called inverse square law. (16) Define universal gravitational constant. CBSE Class 9 Physics Worksheet - Gravitation - Practice worksheets for CBSE students.Prepared by teachers of the best CBSE schools in India. The radius of the earth \(6.4 \times {10^6}m\) and mass of the earth \(6 \times {10^{24}}Kg\). D: None of the above, Increases as height increase from the earth. The 1 m What would be his mass on the earth and on the moon? Q.6> Where the value of gravitational acceleration is less due to the diurnal motion of earth? B: 40000 km above the earth surface If not, Why? C: Weight of a body remain constant \(F \propto \frac{1}{{{r^2}}}\). (24) Calculate the force of gravitation between the earth and the sun, given that the mass of the earth \(6 \times {10^{24}}Kg\) and of the sun \(2 \times {10^{30}}Kg\). C: Zero A: 1 hour 30 min. Q.2> What is the value of Universal Gravitational Constant (G) in C.G.S unit? (6) The weight of a body on the moon is about one-sixth of its weight on the earth. State the What is the total distance covered by the stone? This video deals with an interesting question based on gravitation. Example: Tie a stone to a thread and whirl it round as shown in the figure. (21) The weight of a body is 50 N. What is its mass? (51) Gravitational force acts on all objects in proportion to their masses. The mass of moon is about 0.012 times that of the earth and its diameter is â¦ B: 6.67 * 10-7 cgs unit Hope you enjoy it. (10) Newton's law of gravitation is also called inverse square law. Explain. Then there is the more philosophical question of why the laws hold, what is the mechanism which leads to the observed gravitational effects. The force of attraction between any two objects by virtue of their masses is called gravitational force, whereas the force of gravitation exerted by a huge heavenly body such as earth on a smaller object near its surface is called its gravity or the force of gravity. Geocentric model i.e. Here is a solved numerical example on Gravitation: Question: An object of mass 50kg is raised to a hight of 10m above the ground. (Acceleration due to gravity on moon \(1.63m. (Acceleration due to gravity \(9.8m. (5) What do you mean by the weight of a body on the moon? Here we have covered Important Questions on Gravitation for Class 11 Physics subject. IX PHYSICS : Gravitation ï»¿ CBSE chapter-wise MCQ Multiple Choice Questions,Test Paper,Sample paper based on CCE pattern for class 9 science Gravitation Gravitation; universal law of gravitation, force of gravitation of the earth (gravity), acceleration due to gravity; mass and weight; free fall. Q.3> What is the unit of Universal Gravitational Constant in SI unit? You can refer to NCERT Solutions for Class 9 Science Chapter 10 Gravitation to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams. D: Tangential velocity of equator. The S.I. unit of acceleration due to gravity is \(m.{\sec ^{ - 2}}\). Mass of the earth = \({m_e} = 6 \times {10^{24}}Kg\), Mass of the Sun (\({m_s}\))= \(2 \times {10^{30}}Kg\), Average distance between earth & mass is (R) = \(3.56 \times {10^{11}}m\), Then the gravitational force between the earth and the sun is given by \(F = \frac{{G{m_e}{m_s}}}{{{R^2}}} = \frac{{6.67 \times {{10}^{ - 11}} \times 6 \times {{10}^{24}} \times 2 \times {{10}^{30}}}}{{{{\left( {1.5 \times {{10}^{11}}} \right)}^2}}} = 3.56 \times {10^{22}}N\). What is the weight in newtons of a 10 kg object on the moon and on the earth? or Newton. C: 2 hour 20 min D: 6 * 1024 kg. Who discovered that force is the cause of motion? (26) A boy drops a ball from the top of a tower of height 19.6 m. Calculate (i) the velocity of the ball just before it touch the ground. B: decrease Show this by deriving an expression for the same. D: None of the above. (60) Gravitational force on the surface of the moon is only \(\frac{1}{6}th\) as strong as gravitational force on the earth. (18) State the S.I. Since mass of a body remains constant so the beam balance will give the same measure on the surface of the earth and on the surface of the moon. Gravitation may be the attraction of objects by the earth. C: 2 * 1030 kg \(W = mg\), Where \(W\) is the weight of that body and m is the mass of the body and V is the acceleration due to gravity. (7) How does gravity differ from gravitation? D: 6.67 * 10-10 cgs unit. A force of 5 N produced an acceleration of \(8m. Calculate (i) the maximum height to which it rises. (36) Two object of masses \({m_1}\) and \({m_2}\) having the same size are dropped simultaneously from height \({h_1}\) and \({h_2}\) respectively. (ii) the distance between the objects is doubled and tripled? It means centre seeking force. unit of acceleration due to gravity. This force is called centripetal force. NCERT exemplar solutions for Class 9 science gravitation is an essential study material for the students who wish to score well in Class 9 examination. () What is the acceleration due to gravity on the moon? (ii) the maximum height it reaches and (iii) its position after 4 sec. D: N/m2-Kg. B: Zero Weight of the body \(W = mg\). C: Nuclear force On releasing the thread the the center binding force called as centripetal force is no more acting on it, the stone flies off along the straight line. But it is the apple that falls towards the earth and not vice-versa. B: acceleration is constant [MCQ] Computer Network – GK objective question answers [PDF], MCQ on Work Power Energy [Objective Type Physics Quiz Set], Kepler Laws of Planetary Motion > Physics GK [PDF], Work Power Energy > Important Physics GK [PDF], Physics MCQ for Competitive Exams [Set-5], All 448 Articles of Indian Constitution BENGALI [PDF], Articles of Indian Constitution Urdu PDF Download, [MCQ] Rowlatt Act 1919 Objective Question Answer, [Set-4] Physics MCQ for Competitive Exams, [Set-3] Physics MCQ for Competitive Exams, [Set-2] Physics MCQ for Competitive Exams, GK> List of Significant Newspaper in Indian History [PDF], [Set-1] Physics MCQ for Competitive Exams, GK> List of National Parks in West Bengal [pdf], Math-Magic Class 1 | Math-Magic NCERT Textbook Single pdf, Download> NCERT Class 1 Urdu Text “Ibtedai”. (mass of the earth \(6 \times {10^{24}}Kg\) and radius of the earth \(6.4 \times {10^6}m\) ). D: radius of orbit remain constant. (2) Weight of a change from place to place. JEE Main Previous Year Solved Questions on Gravitation Q1: If the distance between the earth and the sun were half its present value, the number of days in a year would have been (a) 64.5 Mass remain same but weight will be changed. (3) Weight of a body at the centre of the earth. The universal gravitational constant is the force of attraction between two point masses of 1 Kg each kept at a distance of 1 metre. As per the motion of object due to 'g' gravitational pull of earth, both the bodies are acted upon by the same force of earth but the stone will fall first and then the feather. Science Class 9 Important Questions are very helpful to score high marks in board exams. Q.29 What is the value of gravitational acceleration inside the earth? {\sec ^{ - 2}}\) in a 1 kg mass somewhere in space. We have Provided Gravitation Class 9 Science MCQs Questions with Answers to help students understand the concept very well. C: 8.9 m-s2 Gravitation is the force of attraction between two objects in the universe. A: 9.8 m-s2 (17) State Kepler's third law of planetary motion. {\sec ^{ - 2}}\). Is the mass of the body on the moon also one-sixth of its mass on the moon? Does the earth attract the moon with a force that is greater or smaller or the same as the force with which the moon attracts the earth? In the evacuated jar, both iron ball and the feather will fall together at the same time. (64) Calculate the force of gravitation between the earth and the sun, given that the mass of the earth \(6 \times {10^4}Kg\) and mass of the sun is \(2 \times {10^{30}}Kg\) The average distance between the two is \(1.5 \times {10^{11}}m\). D: 3 hour. The above question papers contain MCQs (Multiple choice questions) on Gravitation, which have been collected from various objective oriented entrance examination conducted in India i.e.,MHT-CET, IIT-JEE, AIIMS, CPMT, NCERT, AFMC etc. On the other hand, spring balance measure the weight of a body. (56) What is the importance of universal law of gravitation? D: Can not be answered. D: Zero. (20) What is the relation between mass and weight of a body? Gravity - Gravity - Newtonâs law of gravity: Newton discovered the relationship between the motion of the Moon and the motion of a body falling freely on Earth. the Earth is the orbital centre of all celestial bodies was proposed by _____. (55) What happens to the force between two objects, if (i) the mass of one object is doubled? Q.21 Let the escape velocity of earth is Ve. Since value of 'g' on the moon \( = \frac{1}{6}th\) times the value of 'g' on the earth, so the spring balance shows \(\frac{1}{6}th\) times the weight of the body on the earth at the surface of the moon. MCQ on gravitation.> In this post I come up with some important general knowledge questions with answers on a very crucial topic called Gravitation. B: 2 hours Do you attract the earth as well? A: velocity remain constant in its orbit. 3. 2. {\sec ^{ - 2}}\), finds the maximum height reached by the stone. B: 2 * 1032 kg Heliocentric model was proposed by _____. Unit of G is: \(N.{m^2}K{g^{ - 2}}\), Its value is \(6.67 \times {10^{ - 11}}N{m^2}k{g^{ - 2}}\). {\sec ^{ - 2}}\), Thus, the man would weigh 114.1 N on the moon. (2)Geometry of Spherical Mirror. Beam balance measure the mass of a body. C: Product of its mass and gravitational acceleration (41) The weight of a body on the surface of earth is 392 N. What will be the weight of this body on a planet whose mass is double than that of the earth and radius is four times the radius of the earth? A: N-m-Kg Q.10 What is the approximate mass of earth? Very Short Answer Type Questions (VSAQ) (1) You know that the earth attracts you in the vertically downward direction. D: 9.8 N, A: mass of the object × gravitational acceleration (22) A stone and a feather are thrown from a tower. C: gravitational force due to earth (59) Amit buys few grams of gold at the poles as per the instruction of one of his friends. GRAVITATION MULTIPLE CHOICE QUESTIONS 1. C: Weight never be changed Home \ [MCQ]> Gravitation – Questions Answers. A: 2 * 1034 kg Q.25 Suppose an object is thrown upward with an angle θ providing velocity equal to escape velocity (Ve). What acceleration would the same force provide if both the masses are tied together? B: 10 km/sec Q.17 Does the gravitational force same for two objects inside and outside the water? 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