A block is hung from a vertical spring that is connected to the ceiling. The block is made to oscillate vertically. Call the initial state when the block is at its highest position and the final state when the block is at its equilibrium position. For which of the following systems does the energy remain constant? A. System: block + ceiling (+ spring) + Earth B. System: block + Earth C. System: block D. None of the above.
Simple harmonic motion
Simple harmonic motion is a type of periodic motion in which an object undergoes oscillatory motion. The restoring force exerted by the object exhibiting SHM is proportional to the displacement from the equilibrium position. The force is directed towards the mean position. We see many examples of SHM around us, common ones are the motion of a pendulum, spring and vibration of strings in musical instruments, and so on.
Simple Pendulum
A simple pendulum comprises a heavy mass (called bob) attached to one end of the weightless and flexible string.
Oscillation
In Physics, oscillation means a repetitive motion that happens in a variation with respect to time. There is usually a central value, where the object would be at rest. Additionally, there are two or more positions between which the repetitive motion takes place. In mathematics, oscillations can also be described as vibrations. The most common examples of oscillation that is seen in daily lives include the alternating current (AC) or the motion of a moving pendulum.
A block is hung from a vertical spring that is connected to the ceiling. The block is made to oscillate vertically. Call the initial state when the block is at its highest position and the final state when the block is at its equilibrium position. For which of the following systems does the energy remain constant?
A. System: block + ceiling (+ spring) + Earth
B. System: block + Earth
C. System: block
D. None of the above.
A block on a table (friction between the table and the block is not negligible) is attached to a wall via a horizontal spring. You give the block a brief push so that the block travels horizontally. Call the initial state when the spring first reaches its maximum stretch in the initial direction of motion. The final state is when the spring first reaches its zero stretch length. For which of the following systems does the energy remain constant?
A. System: block + wall (+ spring)
B. System: block
C. System: block + wall (+ spring) + table
D. System: table
E. System: block + table
F. None of the above.
I cant quite figure out which of these are constant.
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