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(d) GMₘ/6R
(b) √2gR
(d) None the these
(b) decreases
(d) -9Gm/r
Energy required to move a satellite of mass m from an orbit of radius 2R to 3R is, (M mass of earth)
(d) GMₘ/6R
(d) GMₘ/6R
See lessA particle falls towards earth from infinity. It’s velocity on reaching the earth would be
(b) √2gR
(b) √2gR
See lessA man weights 60 kg at earth’s surface. At what height above the earth’s surface weight becomes 30 kg. Given radius of earth is 6400 km.
(d) None the these
(d) None the these
See lessWhen a body is taken from poles to equator on the earth, its weight
(b) decreases
(b) decreases
See lessTwo bodies of mass m and 4m are placed at a distance r. The gravitational potential at a point on the line joining them where the gravitational field is zero, is
(d) -9Gm/r
(d) -9Gm/r
See less