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Q.
The condition of equilibrium is satisfied when resultant of all forces acting on body vanishes and also no net torque acts on the body. However body can be different types of equilibrium as stable, unstable, neutral or may be having pure rotation when no resultant force acts on the body. Different conditions of equilibrium or rotational motion can be known by different types of energy it possesses. Column I mentions the state of body and column II mentions the type of energy it possesses. Match the correct options in two columns
COLUMN_I COLUMN_II
A) Body in stable equilibrium P) Rotational kinetic energy
B) Body in unstable equilibrium Q) Minimum potential
energy
C) Body in neutral equilibrium R)Maximum potential energy
D) Body in pure rotational motion S) Constant potential energy
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a
A-R; B-S; C-P D-Q
b
A-P; B-Q; C-R D-S
c
A-S; B-Q; C-P D-R
d
A-Q; B-R; C-S D-P
answer is D.
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Detailed Solution
When body is in state of minimum potential energy the force on body
Alternative:
For given curve
Slope at
At
This shows force is directed towards mean position always
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