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Explain the difference between g and G. - Physics

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प्रश्न

Explain the difference between g and G.

एक पंक्ति में उत्तर
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उत्तर

'g' is acceleration due to earth's gravity and 'G' is universal gravitational constant.

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अध्याय 3: Laws of Motion - Exercise 3 [पृष्ठ १२९]

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फ्रैंक Physics [English] Class 9 ICSE
अध्याय 3 Laws of Motion
Exercise 3 | Q 37 | पृष्ठ १२९

संबंधित प्रश्न

Write the answer of the question with reference to laws of gravitation.

State the universal law of gravitation.


Choose the correct alternative:

Acceleration due to gravity increases/decreases with increasing depth. (assume the earth to be a sphere of uniform density).


Can we apply Newton’s third law to the gravitational force ? Explain your answer.


A person brings a mass of 1 kg from infinity to a point A. Initially the mass was at rest but it moves at a speed of 2 m s −1 as it reaches A. The work done by the person on the mass is −3 J. The potential at A is


Three uniform spheres each having a mass M and radius a are kept in such a way that each touches the other two. Find the magnitude of the gravitational force on any of the spheres due to the other two.


Show that gravity decreases at higher altitudes.


Particles of masses 2M, m and M are respectively at points A, B and C with AB = ½ (BC). m is much-much smaller than M and at time t = 0, they are all at rest (Figure). At subsequent times before any collision takes place ______.


If the law of gravitation, instead of being inverse-square law, becomes an inverse-cube law- ______.

  1. planets will not have elliptic orbits.
  2. circular orbits of planets is not possible.
  3. projectile motion of a stone thrown by hand on the surface of the earth will be approximately parabolic.
  4. there will be no gravitational force inside a spherical shell of uniform density.

Shown are several curves (Figure). Explain with reason, which ones amongst them can be possible trajectories traced by a projectile (neglect air friction).


Four identical particles of equal masses 1 kg made to move along the circumference of a circle of radius 1 m under the action of their own mutual gravitational attraction. The speed of each particle will be ______.


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