Advertisements
Advertisements
Question
State two conditions for a body acted upon by several forces to be in equilibrium.
Advertisements
Solution
Conditions for equilibrium:
- The resultant of all the forces acting on the body should be equal to zero.
- When all forces are applied to the body around the rotational point, the resultant moment should be zero.
RELATED QUESTIONS
State the principle of moments. Give one device as an application of it
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?

A meter scale is pivoted at its mid point and a 50 g mass suspended from the 20 cm mark. What mass balances the ruler when suspended from 65 cm mark?
Give scientific reason for the following:
In a moving bus the standing passenger stands keeping both his legs apart.
State the principle of moments.
Define the term momentum.
A boy of mass 30 kg is fitting at a distance of 2 m from the middle of a see-saw. Where should a boy of mass 40 kg sit so as to balance the see-saw?
Explain the types of stability with suitable examples.
Explain the concept which is used in the continuous movement of the Thanjavur doll?
Give one example of dynamic equilibrium.
