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question_answer1) Two metal spheres of same material and radius r are in contact with each other. The gravitational force of attraction between the spheres is proportional to
question_answer2) If the distance between two particles is increased by 2%, then the force of attraction between them will be:
question_answer3) A spherical planet in the space having a mass 'M' and diameter D. A particle of mass m falls freely near the surface of the planet with an acceleration due to gravity which is equal to
question_answer4) Assume that earth is a spherical planet of uniform density\[\rho ,\]radius \[{{R}_{e}},\]mass\[{{M}_{e}}\]and acceleration due to gravity g. Then the gravitational constant G can be written as
question_answer5) What is the fractional change in the value of freefall acceleration g for a particle when it is lifted from the surface to an elevation h? (\[h<\,\,<R\])
question_answer6) The depth from the surface of the earth it which the acceleration due to gravity will be 75% of the value on the surface of the earth, (radius of the earth = R)
question_answer7) Assuming earth to be a sphere of uniform mass density, how much would a body weigh half down the centre of the earth, if it weighed 100 N on the surface.
question_answer8) A gee-stationary satellite is orbiting the earth at a height of 6R above the surface of the earth, where R is the radius of the earth. The time period of another satellite at a height of 2.5 R from the surface of the earth is ......hours.
question_answer9) If the distance between the earth and the sun were half its present value, the number of days in a year would have been
question_answer10) A geo-stationary satellite orbits around the earth in a circular orbit radius 36,000 km. Then, the time period of a spy satellite orbiting a few hundred km above the earth's surface \[\text{(}{{\text{R}}_{earth}}=\text{6},\text{4}00\,\,\text{km)}\] will approximately be
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