Advertisements
Advertisements
Question
What do you mean by dynamic and static equilibrium? Give one example of each.
Solution
When the body remains in the state of rest under the influence of applied forces, it is in static equilibrium and if it remains in the state of uniform motion, it is in dynamic equilibrium.
For example: In a beam balance when the beam is balanced in the horizontal position, the clockwise and anti-clockwise moments balance each other and the beam has no rotational motion i.e., it is in static equilibrium.
A body moving with uniform velocity in a straight line over a frictionless surface is in dynamic equilibrium.
APPEARS IN
RELATED QUESTIONS
State the condition when a body is in dynamic equilibrium.
The figure shows a uniform metre rule placed on a fulcrum at its mid-point O and having a weight 40 gf at the 10 cm mark and a weight of 20 gf at the 90 cm mark.
- Is the metre rule in equilibrium? If not how will the rule turn?
- How can the rule be brought in equilibrium by using an additional weight of 40 gf?
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.
Give scientific reason for the following:
In a moving bus the standing passenger stands keeping both his legs apart.
The arms of a beam balance are 20 cm and 21 cm, but the pans are of equal weight. By the method of double weighing the weights are found to be 1000 g and 20 g. Find the actual weight of the body
A faulty balance of unequal arms and pans of unequal weights is used to find the true weight of a metal. By double weighing the weights are found to be 1210 g and 1000 g. Calculate the true weight of the metal.
Define the term momentum.
Mention any two conditions for the stability of a body?
