Advertisements
Advertisements
प्रश्न
Where can a body execute free vibrations?
Advertisements
उत्तर
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
संबंधित प्रश्न
State Newton's first law of motion. Why is it called the law of inertia?
A body X of mass 5 kg is moving with velocity 20 m s-2 while another body Y of mass 20 kg is moving with velocity 5 m S-1. Compare the momentum of the two bodies.
A car of mass 600 kg is moving with a speed of 10 ms-1 while a scooter of mass 80 kg us moving with a speed of 50 ms-1. Compare their momentum.
Write the expression for calculating the moment of force about a given an axis.
A, B and C are the three forces each of magnitude 4 N acting in the plane of the paper as shown in Figure. The point O lies in the same plane.
- Which force has the least moment about O? Give a reason.
- Which force has the greatest moment about O? Give a reason.
- Name the forces producing
(a) Clockwise
(b) anticlockwise moments. - What is the resultant torque about the point O?
What is the work done when no net force is applied on the body?
In a beam balance when the beam is balanced in a horizontal position, it is in ________ equilibrium.
Give any two effects of a force on a non-rigid body.
A metal rod AB of length 80 cm is balanced at 45 cm from the end A with 100 gf weights suspended from the two ends.
- If this rod is cut at the center, C, then compare the weight of AC to the weight of BC. (Use >, < or =)
- Give a reason for your answer in (a).
