question_answer1) Why is the law of gravitation called the universal law?
question_answer2) Why is G called the universal gravitational constant?
question_answer6) Is it possible to shield a body from gravitational effects?
question_answer10) We cannot move finger without disturbing all stars. Why?
question_answer14) Which is more fundamental-mass or weight of a body?
question_answer20) Why is centre of mass of a body often called its centre of gravity?
question_answer21) Why the value of g is more at the poles than at the equator?
question_answer22) Why a body weighs more at the poles than at the equator?
question_answer23) Where does a body weigh more? At the sea level or on the mountains?
question_answer26) The weight of a body is less inside the earth than on the surface. Why?
question_answer27) Why do you feel giddy while moving on a merry-go-round?
question_answer28) At which place on earth's surface, the value of \[g\] is largest and why?
question_answer32) Why does a tennis ball bounce higher on a hill than on plains?
question_answer34) Moon-travellers tie heavy weight at their back before landing on the moon. Why?
question_answer35) Why is earth flat at the poles?
question_answer36) What is the effect of rotation of the earth on the acceleration due to gravity?
question_answer40) Explain why tidal waves (high tide and low tide) are formed on seas.
question_answer41) Why are we not thrown off the surface of the earth by the centrifugal force?
question_answer42) A satellite does not need any fuel to circle around the earth. Why?
question_answer43) Why a multi-stage rocket is required to launch a satellite?
question_answer44) Why do different planets have different escape velocities?
question_answer47) The moon has no atmosphere. Why?
question_answer48) The earth has atmosphere. Why?
question_answer54) Why are space rockets usually launched from west to east in the equatorial plane?
question_answer55) A satellite of small mass burns during its descent and not during ascent. Why?
question_answer58) Can we determine the gravitational mass of a body inside an artificial satellite?
question_answer61) Why does an astronaut in spacecraft feel weightlessness?
question_answer63) The linear speed of a rocket is not constant in its orbit. Comment.
question_answer66) Why does the weight of a body become zero at the centre of the earth?
question_answer72) What is the difference between inertial mass and gravitational mass of a body?
question_answer75) Mention the conditions under which the weight of a person can become zero.
question_answer79) What would happen if the force of gravity were to disappear suddenly?
question_answer84) Why does the earth impart the same acceleration to all bodies?
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