Advertisements
Advertisements
Question
Where can a body execute free vibrations?
Advertisements
Solution
The free vibrations of a body actually occur only in the vacuum because the presence of a medium offers some resistance due to which the amplitude of vibration does not remain constant and decreases continuously.
Thus, we define free vibrations as the periodic vibrations of a body of constant amplitude in the absence of any external force on it.
APPEARS IN
RELATED QUESTIONS
A half metre rod is pivoted at the centre with two weights of 20gf and 12gf suspended at a perpendicular distance of 6 cm and 10 cm from the pivot respectively as shown below.
1) Which of the two forces acting on the rigid rod causes clockwise moment?
2) Is the rod in equilibrium?
3) The direction of 20 kgf force is reversed. What is the magnitude of the resultant moment of the forces on the rod?
The steering wheel of a vehicle is of large diameter.
State the relationship between force, mass and acceleration. Draw graphs showing the relationship between Acceleration and mass for a constant force.
What is the work done when no net force is applied on the body?
The S.I. unit of moment of force is ______.
The diagram shows a uniform metre rule weighing 100gf, pivoted at its centre O. Two weights 150gf and 250gf hang from the point A and B respectively of the metre rule such that OA = 40 cm and OB = 20 cm. Calculate :
the total clockwise moment about O
State one factor on which the magnitude of a non-contact force depends. How does the magnitude of a non-contact force change along with distance?
State the effects that a force can produce. Given one example of each.
A couple of 15 N force acts on a rigid body, such that arm of couple is 85 cm. Calculate moment of couple in the SI system.
A door lock is opened by turning the lever (handle) of length 0.2 m. If the moment of force produced is 1 Nm, then the minimum force required is ______.
