85.
A satellite revolves around the earth in an elliptical orbits. Its speed

86.
The weight of an object on the Moon is equal to . . . . . . . . of its weight on the Earth.

89.
How long will it take to reach its highest point, if a ball is punched upwards with an initial velocity of 25 m/s, [The value of g can be taken as 10 m/s2].

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