Lesson no.1 Gravitation
Choose the correct alternative and complete the following sentence.
1) Where is weight of body is maximum ?.
a) At the moon b)at the poles c) at the equator d) at the center of earth 2) The line joining the planet and the Sun sweeps --------- areas in equal intervals of time. a)Half b) Double c) Uqual d) unqual 3) Every object in the Universe------------ every other object with a definite force. a) attracts b) reflacts c) free fall d) none of these 4) Weight of the object on the earth =--------- a)- b) - c)- d)-
5) Weight being a force ,its SI unit is --------- a) kg b) cms c)gm/s2 d) Newton 6) Mass is a ------------------ quantity a) vector b) natural c) scalar d) smaller 7) SI unit of Gravitational constant is ------ a) dyne.cm2/g2 b) N.m2/kg2 c) dyne.cm3/g3 d) N.m3/kg38) The value of “g”was first experimentally measured by -------------- a) Mery Query b) IssacNewton c) Johannes Kepler d) Henry Cavendish 9) The center of mass of any object having - ------------ density is at its centroid. a) uniform b) less c) more d) opposite10) The level of water in the sea changes because of the gravitional force exerted by the -------------- a) Sun b) Earth c)Moon d)Soil 11) Earth’s gravitational acceleration is denoted by ----------------- a) “ f ” b) “ g ” c) “ s ” d) “ u ”12) ---------- of an object changes from place to place. a) Speed b) Acceleration c) Mass d)Weight 13) Value of “g” is lowest at the --------------- a) poles b) equator c) center d) mount everest 14) Find out the wrong pair. a) `Weight----------Kg b) Mass---- Kg c) Acceleration due to gravity ---- m/s2d) `Gravitational constant ---- Nm2/kg2 15) Which statement of the following is True. a) `Weight on Moon is 6 time grater than earth b) We can jump 6 times higher on moon as compared to earth. c) Moon is 6 times smaller than earth d) Weight on Moon is double than earth 16) True free fall is possible only in ----------.a) vacuum b) air c) water d) soil 17) Which statement of the following is true for free fall a) `Acceleration of heavy object is greter than light object. b) Acceleration of heavy object is less than light object. c) Acceleration of heavy and light object is equal. d) None of any above. 18) --------- is zero at the center of the earth. a) Acceleration b) Speed c) Weight d)Mass19) The reason for value of “g” is not same everyvery on the surface of earth a) The shape of earth is not exactly spherical. b) The shape of earth is exactly spherical.. c) The earth revolet around the Sun. d) None of any above.20) Maximum hight reached by man made balloonis-----------------Km. a) 36.6 b) 400 c) 8.8 d)66.321) According to Kepler’s third law T2Ãœ r n where n =----------- a) 1 b) 2 c) 3 d) 4 22) Weight is a ------------------ quantity a) vector b) natural c) scalar d) smaller23) Value of “g” is higest at the -------------- a) poles b) equato rc) center d) mount everest 24) SI unit of -weight is ---------------------- a) kg b) cms c)gm/s2 d) Newton 25) ------------------ can never be zero a) force b) mass c) weight d) gravity 26) The weight on the moon is nearly --------of the weight on the earth a)1/6th b) 6/6th c) 1/16th d) 3/6th27) The acceleration due to gravity does not depend on the ---------- of the body a)hight b) weight c) Mass d) force 28) What is the value of ‘ g’ at the Mount Everest a) 8.8 m/s2 b) 9.7 m/s2 c) 9.8 m/s2 d) 8.9 m/s229) CGS unit of weight is ------------------ a)kg b) dyne c)gm/s2 d) Newton 30) ----------- is zero at the center of the earth a)force b) mass c) weight d) gravity Answers 1) b) at the poles 2) c) Uqual 3) attracts 4) b) - 5) d) Newton 6) c) scalar 7) b) N.m2/kg2 8) d)Henry Cavendis 9).a) uniform 10) c) Moon 11 ) b) “ g ” 12) d)Weight 13) b) equator 14) a) `Weight----Kg 15) b) We can jump 6 times higher on moon as compared to earth. 16) a) vacuum 17) c) Acceleration of heavy and light object is equal. 18) c) Weight 19) a) The shape of earth is not exactly spherical. 20) a) 36.6 21) c) 3 22) a) vector 23) a) poles 24) d) Newton 25) a) mass 26) a)1/6th27) c) Mass 28) c) 9.8 m/s2 29) b) dyne 30) c) weight
5) Weight being a force ,its SI unit is --------- a) kg b) cms c)gm/s2 d) Newton 6) Mass is a ------------------ quantity a) vector b) natural c) scalar d) smaller 7) SI unit of Gravitational constant is ------ a) dyne.cm2/g2 b) N.m2/kg2 c) dyne.cm3/g3 d) N.m3/kg38) The value of “g”was first experimentally measured by -------------- a) Mery Query b) IssacNewton c) Johannes Kepler d) Henry Cavendish 9) The center of mass of any object having - ------------ density is at its centroid. a) uniform b) less c) more d) opposite10) The level of water in the sea changes because of the gravitional force exerted by the -------------- a) Sun b) Earth c)Moon d)Soil 11) Earth’s gravitational acceleration is denoted by ----------------- a) “ f ” b) “ g ” c) “ s ” d) “ u ”12) ---------- of an object changes from place to place. a) Speed b) Acceleration c) Mass d)Weight 13) Value of “g” is lowest at the --------------- a) poles b) equator c) center d) mount everest 14) Find out the wrong pair. a) `Weight----------Kg b) Mass---- Kg c) Acceleration due to gravity ---- m/s2d) `Gravitational constant ---- Nm2/kg2 15) Which statement of the following is True. a) `Weight on Moon is 6 time grater than earth b) We can jump 6 times higher on moon as compared to earth. c) Moon is 6 times smaller than earth d) Weight on Moon is double than earth 16) True free fall is possible only in ----------.a) vacuum b) air c) water d) soil 17) Which statement of the following is true for free fall a) `Acceleration of heavy object is greter than light object. b) Acceleration of heavy object is less than light object. c) Acceleration of heavy and light object is equal. d) None of any above. 18) --------- is zero at the center of the earth. a) Acceleration b) Speed c) Weight d)Mass19) The reason for value of “g” is not same everyvery on the surface of earth a) The shape of earth is not exactly spherical. b) The shape of earth is exactly spherical.. c) The earth revolet around the Sun. d) None of any above.20) Maximum hight reached by man made balloonis-----------------Km. a) 36.6 b) 400 c) 8.8 d)66.321) According to Kepler’s third law T2Ãœ r n where n =----------- a) 1 b) 2 c) 3 d) 4 22) Weight is a ------------------ quantity a) vector b) natural c) scalar d) smaller23) Value of “g” is higest at the -------------- a) poles b) equato rc) center d) mount everest 24) SI unit of -weight is ---------------------- a) kg b) cms c)gm/s2 d) Newton 25) ------------------ can never be zero a) force b) mass c) weight d) gravity 26) The weight on the moon is nearly --------of the weight on the earth a)1/6th b) 6/6th c) 1/16th d) 3/6th27) The acceleration due to gravity does not depend on the ---------- of the body a)hight b) weight c) Mass d) force 28) What is the value of ‘ g’ at the Mount Everest a) 8.8 m/s2 b) 9.7 m/s2 c) 9.8 m/s2 d) 8.9 m/s229) CGS unit of weight is ------------------ a)kg b) dyne c)gm/s2 d) Newton 30) ----------- is zero at the center of the earth a)force b) mass c) weight d) gravity Answers 1) b) at the poles 2) c) Uqual 3) attracts 4) b) - 5) d) Newton 6) c) scalar 7) b) N.m2/kg2 8) d)Henry Cavendis 9).a) uniform 10) c) Moon 11 ) b) “ g ” 12) d)Weight 13) b) equator 14) a) `Weight----Kg 15) b) We can jump 6 times higher on moon as compared to earth. 16) a) vacuum 17) c) Acceleration of heavy and light object is equal. 18) c) Weight 19) a) The shape of earth is not exactly spherical. 20) a) 36.6 21) c) 3 22) a) vector 23) a) poles 24) d) Newton 25) a) mass 26) a)1/6th27) c) Mass 28) c) 9.8 m/s2 29) b) dyne 30) c) weight
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