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प्रश्न
What do you mean by the state of equilibrium? What are the conditions for stable equilibrium?
उत्तर
A body is said to be in equilibrium under the action of a number of forces, if the forces are not able to produce any change in the state of rest or of uniform motion or uniform rotation.
Conditions for stable equilibrium:
(a) The body should have a broad base.
(b) Centre of gravity of the body should be as low as possible.
(c) Vertical line drawn from the centre of gravity should fall within the base of the support.
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संबंधित प्रश्न
State the condition when a body is in static equilibrium.
State two condition for a body acted upon by several forces to be in equilibrium.
State two conditions for a body acted upon by several forces to be in equilibrium.
Give scientific reason for the following:
While climbing a hill you will try to bend your body forward.
In figure, a uniform bar of length l m is supported at its ends and loaded by a weight W kgf at its middle. In equilibrium, find the reactions R1 and R2 at the ends.
`["Hint:" "In equilibrium" "R"_1 + "R"_2 = "W" "and" "R"_1 xx l/2 = "R"_2 xx l/2]`
What is the weight of a body placed at the centre of the earth?
What do you mean by dynamic and static equilibrium? Give one example of each.
One end of a spring is kept fixed while the other end is stretched by a force as shown in the diagram.
(i) Copy the diagram and mark on it the direction of the restoring force.
(ii) Name one instrument which works on the above principle.
