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प्रश्न
The work done by the Sun’s gravitational force on the Earth is __________.
विकल्प
always zero
always positive
can be positive or negative
always negative
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उत्तर
The work done by the Sun’s gravitational force on the Earth is can be positive or negative.
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संबंधित प्रश्न
A planet moving along an elliptical orbit is closest to the Sun at distance r1 and farthest away at a distance of r2. If v1 and v2 are linear speeds at these points respectively. Then the ratio `"v"_1/"v"_2` is
The gravitational potential energy of the Moon with respect to Earth is ____________.
Will the angular momentum of a planet be conserved? Justify your answer.
Is potential energy the property of a single object? Justify.
Prove that at points near the surface of the Earth, the gravitational potential energy of the object is U = mgh.
If the Earth’s pull on the Moon suddenly disappears, what will happen to the Moon?
Two bodies of masses m and 4m are placed at a distance of r. Calculate the gravitational potential at a point on the line joining them where the gravitational field is zero.
If the ratio of the orbital distance of two planets `"d"_1/"d"_2` = 2, what is the ratio of gravitational field experienced by these two planets?
Calculate the gravitational field at point O due to three masses m1, m2 and m3 whose positions are given by the following figure. If the masses m1 and m2 are equal what is the change in a gravitational field at the point O?
Earth revolves around the Sun at 30 km s−1. Calculate the kinetic energy of the Earth. In the previous example, you calculated the potential energy of the Earth. What is the total energy of the Earth in that case? Is the total energy positive? Give reasons.
