The mass of moon is about 0.012 times that of earth and its diameter is about 0.25 times that of earth .The value of G on the moon will be
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For a satellite, escape speed is 11kms−1. If the satellite is launched at an angle of 60∘ with the vertical, what will be the escape speed?
The radii of circular orbits of two satellite A and B of the earth are 4R and R, respectively. If the speed of satellite A is 3v, then the speed of satellite B will be
Five particles each of mass 'm' are kept at five verties of a regular pentagon . A sixth particles of mass 'M' is kept at center of the pentagon 'O'.Distance between'M' and is 'm' is 'a'. Find (a) net force on 'M' (b) magnitude of net force on 'M' if any one particle is removed from one of the verties.
The numerical value of the angular velocity of rotation of the earth should be…….. Rad/s in order to make the effective acceleration due to gravity equal to zero.
A body projected vertically from the earth reaches a height equal to earth's radius before returning to the earth. The power exerted by the gravitational force is greatest.
Buoyant force is directed
A spaceship is stationed on Mars. How much energy must be expended on the spaceship to launch it out of the solar system ? Mass of the space ship = 1000 kg; mass of the sun = 2×1030 kg; mass of mars = 6.4×1023 kg; Radius of mars = 3395 km; Radius of the orbit of mars = 2.28×108 km
A body weighs 5 N in air and 2 N when immersed in a liquid. The buoyant force is