The dependence of acceleration due to gravity g on the distance r from the centre of the earth, assumed to be a sphere of radius R of uniform density is as shown in Fig. below: The correct figure is
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Escape velocity of a body from the surface of earth is 11.2km/sec. from the earth surface. If the mass of earth becomes double of its present mass and radius becomes half of its present radius then escape velocity will become
What is the acceleration of free fall?
Assertion :A block of wood is floating in a pond of water and its apparent weigth is zero. Reason :The weight of water displaced (buoyant force) acting vertically upwards is just equal to the weight of the body which acts vertically downwards.
How will you 'weigh the sun', that is estimate its mass? The mean orbital radius of the earth around the sun is 1.5× 108 km.
A planet is moving in an elliptic orbit. If T,V,E and L stand, respectively, for its kinetic energy, gravitational potential energy, total energy and angular momentum about the centre of force, then
For a satellite moving in an orbit around the earth, ratio of kinetic energy to potential energy is
Consider the following two statements and identify the correct choice.A: When a body floats in a liquid, it displaces the liquid whose weight is equal to its own weight.B: When a body sinks in a liquid, it displaces the liquid whose volume is equal to its own volume.
Which of the following is an application of Archimedes' principle?