You can buy Class 11 Physics NCERT Book from various online platforms and get doorstep delivery in no time. Binding energy of the satellite of mass m is given by. Gravitation is one of the four classes of interactions found in nature. You can simply visit the link to go to amazon website and order online. (i) Law of orbit Every planet revolve around the sun in elliptical orbit and sun is at its one
centre of mass. Its diameter at poles is approximately 42 km less than its diameter at equator. (iv) The law of gravitational is applicable for all bodies, irrespective of their size, shape and
It fails when the distance between the objects is less than 10-9 m i.e., of the order of intermolecular distances. Height from earth’s surface = 880 km
PSLV series satellites are polar satellites of India. Angular velocity = 2π / 84 = π / 42 rad / min. Gravitation class XI Physics NCERT book, refresher books and other reference books have many important questions. Link of our facebook page is given in sidebar. (b) Time period = 84 min approximately
If velocity of projection u of satellite is greater than the escape velocity ( v > ve), then the satellite will escape away following a hyperbolic path. Relation between escape velocity and orbital velocity of the satellite
(a) Inertial mass = force / acceleration
The value of g becomes zero at earth’s centre. (iv) A bottle filled with water at 30°C and fitted with a cork is taken to the moon. where M = mass of the earth = 6.0 * 1024 kg and R = radius of the earth = 6.38 * 106 m. Acceleration due to gravity at a height h above the surface of the earth is given by, Factors Affecting Acceleration Due to Gravity. The value of G is independent of the nature and size of the bodies well as the nature of the medium between them. about its own axis, then acceleration due to gravity at a place having latitude λ is given by. The energy required to remove a satellite from its orbit around the earth (planet) to infinity is called binding energy of the satellite. (vii) Newton’s third law of motion holds good for the force of gravitation. ve = √2 vo. The value of g changes slightly from place to place. Select chapter you wish to download and its done. (ii) Law of area The radius vector drawn from the sun to a planet sweeps out equal areas in
whose angle of inclination with equatorial plane of earth is 90°. The additional questions for practice from XI class CBSE exam are collected from various sources. where, a = semi-major axis of the elliptical orbit. = 0.00125 rad / s, (vi) Inertial mass and gravitational mass. Escape velocity does not depend upon the mass or shape or size of the body as well as the direction of projection of the body. }
A satellite which appears to be at a fixed position at a definite height to an observer on earth is
Orbital velocity of a satellite is the minimum velocity required to the satellite into a given orbit around earth. (ii) If V = vo then satellite revolves in circular path/orbit around earth. external points of spherical bodies the whole mass can be assumed to be concentrated at its
Gravitational potential energy at height h from surface of earth. Natural satellites are those heavenly objects which are not man made and revolve around the earth. opened at the surface of the moon then water will boil. }
(d) Gravitational mass of a body is affected by the presence of other bodies near it. To get fastest exam alerts and government job alerts in India, join our Telegram channel. (c) Angular speed ω = 2π / 84 rad / min
Orbital velocity = 8 km / s
Every object in the universe attracts every other object with a force which is called the force of gravitation. GRAVITATION MADE BY- HIMANSHU CLASS 11TH A 2. Copyright @ ncerthelp.com A free educational website for CBSE, ICSE and UP board.
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