The gravitational force between two objects is proportional to 1/R (and not as 1/R2) where R is separation between them, then a particle in circular orbit under such a force would have its orbital speed v proportional to
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A mass m is at a distance a from one end of a uniform rod of length l and mass M. Find the gravitational force on the mass due to tke rod.
The volume of a 500 g sealed packet is 350 cm3. Will the packet float or sink in water if the density of water is 1 g cm−3? What will be the mass of the water displaced by this packet?
A plenet moving along an elliptical orbit is closest to the sun at a distance r1 and farthest away at a distance of r2. If v1 and v2 are the linear velocities at these points respectively, then the ratio v2v1 is
Two particles of equal mass go around a circle of radius R under the action of their mutual gravitational attraction. Find the speed of each particle.
In what direction does the buoyant force on an object immersed in a liquid act?
Suppose there existed a planet that went around the sun twice as fast as the earth.What would be its orbital size as compared to that of the earth ?
The escape velocity from the surface of the earth is Ve. The escape velcotiy from the surface of a planet whose mass and radius are three times those of the earth, will be
States the Archimedes' principle. List its two applications.