# Physics Final Exam Conceptual Questions

decreases by a factor of 2
A force F is applied to a spring, resulting in a displacement x. If the magnitude of F is reduced by a factor of 2, then the displacement
T/2
A mass is attached to a spring and executes simple harmonic motion. At time t= 0, the object is a distance A from the unstrained position and the instantaneous speed is 0. If T is the period, the next time after t=0 that the object will be a distance A from the unstrained position is
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The object’s velocity is zero when its acceleration is a maximum.
Which one of the following statements is true concerning an object executing simple harmonic motion?
The amplitude remains the same, and the angular frequency increases
A block is attached to a horizontal spring. On top of this block rests another block. The two- block system slides back and forth in simple harmonic motion on a frictionless horizontal surface. At one extreme end of the oscillation cycle, when the blocks come to a momentary halt, the top block is lifted vertically upward, without disturbing the bottom block. What happens to the amplitude and the angular frequency of the ensuing motion?
The maximum speed of A is at the same as that of object B.
Object A is attached to ideal string A and is moving in simple harmonic motion. Object B is attached to ideal spring B and is moving in simple harmonic motion. The period and the amplitude of object B are both two times the corresponding values for object A. How do the maximum speeds of the two objects compare?
The amplitude will be greeter than x0.
A block is attached to the end of a horizontal ideal spring and rests on a frictionless surface. The other end of the spring is attached to a wall. The block is pulled away from the spring’s unstrained position by a distance x0 and given an initial speed of v0 as it is releases. Which one of the following statements concerning the amplitude of the subsequent simple harmonic motion is true.
1 and 3 only
You wold like to use a simple pendulum to determine the local value of the acceleration due to gravity. Consider the following parameters: (1) Pendulum length, (2) mass of the object a the free end of the pendulum, (3) the period of the pendulum as it swings in simple harmonic motion, (4) the amplitude of the motion. Which of these parameters must be measured to find a value for g?
Th professor’s weight is distributed over all of the nails in contact with the professor’s body, so the pressure exerted a nail at any location is too small to penetrated the skin.
In a classroom demonstration. a physics professor lies on a “bed of nails.” The bed consists of a large number of evenly spaced, relatively sharp nails mounted in a board so that the points extend vertically outward from the board. While the professor is lying down, nearly one thousand nails make contact with his body. Which ones of the following choices provides the best explanation as to why the professor is not harmed by the bed of nails?
All 3 containers have the same pressure at the bottom
The drawing shows 3 containers filled to the same height with the same liquid. In which container, if any, is the pressure at the bottom greatest?
The buoyant forces on A and B are the same
Two objects, A and B, have the same volume and are completely submerged in a liquid, although A is deeper than B. Which object, if either, experiences the greater buoyant force?
The initial reading is the same as the final reading.
A glass beaker, filled to the brim with water, is resting on a scale. A solid block is then placed in the water, causing some of it to spill over. The water that spills is wiped away, and the beaker is still filled to the brim. How do the initial readings and finals readings on the scale compare if the block is made from wood? (whose density is less than that of water)
The initial reading is less than the final reading
A glass beaker, filled to the brim with water, is resting on a scale. A solid block is then placed in the water, causing some of it to spill over. The water that spills is wiped away, and the beaker is still filled to the brim. How do the initial readings and finals readings on the scale compare if the block is made from iron? (whose density is greater than that of water)
30 K
Complete the following statement: A temperature decrease of 30 degrees Celsius is equal to a temperature decrease of
Both balls will reach the same final temperature.
The specific heat capacity of iron is approximately half that of aluminum. Two balls of equal mass, one made or iron and the other made of aluminum, both at 90 degrees Celsius, are dropped into a thermally insulated jar that contains an equal mass of water at 25 degrees Celsius. Thermal equilibrium is eventually reached. Which one of the following statements concerning the final temperature is true?
The object with the smaller mass experiences the temperature change with the greater magnitude
Two objects are made of the same material but have different masses. The two are placed in contact, and neither one loses any heat to the environment. Which object experiences the temperature change with the greater magnitude, or does each object experience temperature change of the same magnitude? Assume initial temperate of the objects are different.
The substance undergoes a change of phase
Heat is added to a substance, but its temperature does not rise. Which one of the following statements provides the best explanation of this observation?
The wavelength is cut in half
A small- amplitude transerve wave is traveling on a string. The frequency of the wave is suddenly doubles while the tension remains constant. Which one of the following is a true statement?
The wave speed increases and the wavelength increases
You send a traveling wave along a particular string by oscillating one end. If you increase the tension in the string while holding the frequency constant
The particle of dust will oscillate left and right with a frequency of 226 Hz.
A particle of dust is floating in the air approximately one half meter in front of a speaker. The speaker is then turned on produces a constant pure tone as shown. The sound waves produced by the speaker travel horizontally. Which one of the following statements correctly describes the subsequent motion of the dust particle, if any?
I/4
A source emits sound waves uniformly in all directions. The intensity at a distance r from the source is I. What is the intensity at a distance 2r from the source?

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