Type A. con grauitational field . 1. Tuo alpheres of masses 64 kg are placed at a distance room apart. Find the position of a paint the centre of the this spheres, , where the gravitational field is zero. [Ans. 3.2 m ( from 64kg sphers] .
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Answer:
The gravitational field at the mid-point of the line joining the centers of the two spheres =
(r/2)
2
GM
−
(r/2)
2
GM
=0 N
Gravitational potential at the midpoint of the line joining the centres of the two spheres is V=−
r/2
GM
−
r/2
GM
=−
r
4GM
V=−
0.1
4×6.67×10
−11
×100
=−2.68×10
−7
J/kg
As the effective force on the body placed at mid-point is zero, so the body is in equilibrium. If the body is displaced a little towards either mass body from its equilibrium position, it will not return back to its initial position of equilibrium. Hence, the body is in an unstable equilibrium
Explanation:
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