Attempt any 22 (twenty two short question from Question 2,3 and 4, at least 8 short questions from question 2, 8 short question from question 3 and 6 short question from question 4. All question carry equal marks. No. 2 Write answers of any EIGHT questions,
How long must a simple pendulum be in order to have a period of one second?
(8x2=16)
A simple pendulum suspended from the ceiling of an elevator has a time period T, when the elevator is at rest. What will be time period if the elevator falls freely?
How can we measure the height of the tower with out having any measuring tape? A metal bob of simple pendulum swings to and fro with SHM which quantity does not become zero through out oscillation?
Why soldiers are advised to break their steps while walking on a bridge?
What is importance of resonance in helicopter and aeroplane?
If mass is increased by 9 times then what will be effect on the frequency in mass spring system? What will be effect to the time period of simple pendulum if its mass is increased by 4 times?
What happens to frequency of simple pendulum its length is 100 cnf?
What if frequency of second's pendulum? Would you keep the amplitude of simple pendulum small or large? Why?
A singer, holding a note of right frequency, can shatter a glass. Explain?
QNo. 3 Write answers of any EIGHT questions. Is there a connection between F and X in mass spring system? Explain.
Explain why the acceleration is not zero but the velocity is momentarily zero when the swinging pendulum reaches the extreme position from the mean position.
(8x2=16)
Explain how the acceleration is zero but the velocity is maximum when the swinging pendulum crosses the mean
position
what will happen to the period of a vibrating system if we doubled the weight attached to spring? in resonance, which dominates that the forced oscillation; the frequency of the external force or the natural
frequency of the body?
How can you compare the masses of two bodies by observing their frequencies of oscillation when supported by a
spring? Find the frequency of simple pendulum whose length is 0.25 m at g- 9.8m/s2.
A spring has spring constant k and an object of mass m is suspended from it.
The spring is cut in half and the same object is suspended from one of the halves: How the frequencies of oscillation, before and after the spring is cut, are related?
What happens to frequency of a swing (simple pendulum) as its oscillation die down from large amplitude to small? Can we realize an ideal simple pendulum? Changes could you make in harmonic oscillator that would doubled the
maximum speed of oscillating object. Give one practical example of each of free and forced oscillation
Will the period of a vibrating string increase, decrease or remain constant by addition of more weight?
NGA Write answers of any SIX questions. A wire hangs from a dark high tower
(6x2=12) so that its upper end is not visible. How can the length of wire be determined?
Why the damping devices often used on machinery?
The body of the bus vibrates when it travel at a particular speed. Explain How food is heated in microwave oven?
Simple harmonic motion is a particular example of periodic motion. Explain.
Define any two of the terms used in the SHM: vibration; time period, frequency; displacement and amplitude.
mass spring system is hung vertically and set in to oscillations, why does the motion eventually stop? Describe some common phenomena in which resonance plays an important role. Explain the relation between the total Potential energy and kinetic energy for a body executing with SHM.
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