Comets move around the sun in highly elliptical orbits. The gravitational force on the comet due to the sun is not normal to the comet’s velocity in general. Yet the work done by the gravitational force over every complete orbit of the comet is zero. Why?
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Gravitational force on the surface of the moon is only 1/6 as strong as gravitational force on the Eart
Weight of an object on the moon = 1 / 6 × Weight of an object on the Earth Also, Weight = Mass × Acceleration Acceleration due to gravity, g = 9.8 m/s2 Therefore,...
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What is the source of centripetal force that a planet requires to revolve around the Sun? On what factors does that force depend?
Gravitational force. This force depends on the product of the masses of the planet and sun and the distance between them.
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Ablock is on rough surface.is the maximum force applied so that the block does not move is equal to the minimum force applied to just move the block?
A block resting on a horizontal surface and suppose a force is applied to it and still the body is not moving then, friction force is equal to applied force...
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If you compare the gravitational force on the earth due to the sun to that due to the moon,
Tidal effect depends inversely upon the cube of the distance while, gravitational force depends inversely on the square of the distance. Since the distance between the Moon and the Earth is...
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A comet orbits the Sun in a highly elliptical orbit. Does the comet have a constant (a) linear speed, (b) angular speed, (c) angular momentum,
No No Yes No No Yes Angular momentum and total energy at all points of the orbit of a comet moving in a highly elliptical orbit around the Sun are constant. Its linear speed, angular speed,...
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Which of the following quantities remain constant in a planetory motion (consider elliptical orbits) as seen from the sun ?
(d) Angular momentum. EXPLANATION: The speed in an elliptical orbit is not constant and hence not the kinetic energy. So (a) and (c) are not true. The radius vector also does not sweep equal...
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Which of the following quantities remain constant in a planetory motion (consider elliptical orbits) as seen from the sun?
(d) Angular momentum. EXPLANATION: The speed in an elliptical orbit is not constant and hence not the kinetic energy. So (a) and (c) are not true. The radius vector also does not...
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What is difference between asteroids and comets ? 1. Asteroids are small rocky planetoids, while comets are formed
(b) Comets found beyond Neptune i.e. kupier belt.
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Tides occur in the oceans and seas due to which among the following? 1. Gravitational force of the Sun
(d) Tides are the rise and fall of sea levels caused by the combined effects of gravitational forces exerted by the Moon, Sun, and rotation of the Earth.
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The tail of a comet is directed away from the sun because: (a) as the comet rotates around the sun,
(c) The radiation emitted by sun exerts a radial presssure on the comet. So the tail of comet is always directed away from the sun.
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