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प्रश्न
The ______ force is much weaker than other forces in nature.
विकल्प
gravitational
electromagnetic
nuclear force
intermolecular
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उत्तर
The gravitational force is much weaker than other forces in nature.
Explanation:
- Gravity is far weaker than electromagnetic and nuclear forces at atomic and molecular scales.
- However, because mass is always positive and bodies like planets and stars are huge, gravity controls astronomical motion.
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संबंधित प्रश्न
How does the force of gravitation between two objects change when the distance between them is reduced to half?
What happens to the force between two objects, if the masses of both objects are doubled?
Answer the following:
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A solid sphere of mass m and radius r is placed inside a hollow thin spherical shell of mass M and radius R as shown in the following figure . A particle of mass m' is placed on the line joining the two centres at a distance x from the point of contact of the sphere and the shell. Find the magnitude of the resultant gravitational force on this particle due to the sphere and the shell if (a) r < x < 2r, (b) 2r < x < 2R and (c) x > 2R.
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[Hint : If a line y = mx + c makes angle θ with the X-axis, m = tan θ.]
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If the law of gravitation, instead of being inverse-square law, becomes an inverse-cube law- ______.
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- circular orbits of planets is not possible.
- projectile motion of a stone thrown by hand on the surface of the earth will be approximately parabolic.
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Two particles of equal mass 'm' go around a circle of radius R under the action of their mutual gravitational attraction. The speed of each particle with respect to its centre of mass is ______.
If the distance between two objects is doubled, the gravitational force becomes ______.
