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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
If the masses of the Earth and Sun suddenly double, the gravitational force between them will ___________.
The magnitude of the Sun’s gravitational field as experienced by Earth is
Define the gravitational field.
Define gravitational potential energy.
Define gravitational potential.
Derive the expression for gravitational potential energy.
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.
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.
An object is thrown from Earth in such a way that it reaches a point at infinity with non-zero kinetic energy `["K"."E"("r" = ∞) = 1/2 "Mv"_"∞"^2]`, with what velocity should the object be thrown from Earth?
