Physics, asked by rajendraaryanr3076, 1 year ago

Three conditions of unstable equilibrium

Answers

Answered by Sumit15081947
0

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STATES OF EQUILIBRIUM

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States of equilibrium

  There are three states of equilibrium:

  Stable equilibrium

  Unstable equilibrium

  Neutral equilibrium

Stable equilibrium

  When the center of gravity of a body lies below point of suspension or support, the body is said to be in    STABLE EQUILIBRIUM. For example a book lying on a table is in stable equilibrium.

Explanation

  A book lying on a horizontal surface is an example of stable equilibrium. If the book is lifted from one edge    and then allowed to fall, it will come back to its original position.

  Other examples of stable equilibrium are bodies lying on the floor such as chair, table etc.

Reason of stability

  When the book is lifted its center of gravity is raised . The line of action of weight passes through the    base of the book. A torque due to weight of the book brings it back to the original position.

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Unstable equilibrium

  When the center of gravity of a body lies above the point of suspension or support, the body is said to    be in unstable equilibrium

Example

  pencil standing on its point or a stick in vertically standing position.

  Explanation:

  If thin rod standing vertically is slightly disturbed from its position it will not come back to its original    position. This type of equilibrium is called unstable equilibrium, other example of unstable equilibrium are    vertically standing cylinder and funnel etc.

Reason of instability

  when the rod is slightly disturbed its center of gravity is lowered . The line of action of its weight lies    outside the base of rod. The torque due to weight of the rod toppled it down.

Neutral equilibrium

  When the center of gravity of a body lies at the point of suspension or support, the body is said to be in    neutral equilibrium. Example: rolling ball.

Explanation

  If a ball is pushed slightly to roll, it will neither come back to its original nor it will roll forward rather it will    remain at rest. This type of equilibrium is called NEUTRAL EQUILIBRIUM.

Reason of neutral equilibrium

  If the ball is rolled, its center of gravity is neither raised nor lowered. This means that its center of gravity    is at the same height as before.

Answered by TheUnsungWarrior
0

Dear student,

Following are the conditions for unstable equilibrium;

  • when displaced from equilibrium position a net force starts acting on the bob which moves the body in the direction of displacement or away from the equilibrium position.
  • potential energy in equilibrium position is maximum as compared to the other positions or d²u/dr² = negative
  • when displaced from equilibrium position the centre of gravity of the body goes up.
  • net force is zero.
  • du/dr = 0 or shape of U - r graph is zero.
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