Advertisements
Advertisements
प्रश्न
State the principle of moments. Give one device as an application of it
Advertisements
उत्तर
According to the principle of moments, if the algebraic sum of moments of all the forces acting on the body about the axis of rotation is zero, the body is in equilibrium. A physical balance (or beam balance) works on the principle of moments.
संबंधित प्रश्न
State the condition when a body is in static 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?
Give scientific reason for the following:
In a moving bus the standing passenger stands keeping both his legs apart.
State the principle of moments.
Explain when we carry weight, on one hand, we bend on the other side.
State two conditions when the work done by a force acting on a body is zero.
What do you mean by static equilibrium? Give one example.
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?
Mention any two conditions for the stability of a body?
