5) What is the distance the lower spring is extended from its unstretched length? cm Submit 6) Finally, the elevator is moving downward with a velocity of v = -3.2 m/s but accelerating downward at an acceleration of a = -2.7 m/s². Compare the magnitude of the NET force on each mass: F1 = F2 = F3 F1 > F2 > F3 oF2 > F3 > F1 Submit 7) What is the magnitude of the net force on the middle mass? N Submit
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.
Q5 an Q7
![A single mass (m1 = 3.9 kg) hangs from a spring in a motionless elevator. The spring
constant is k = 319 N/m.
1) What is the distance the spring is stretched from its unstretched length?
11.98
cm Submit
2)
m.
m,
m.
Now, three masses (m1 = 3.9 kg, m2 = 11.7 kg and m3 = 7.8) hang from three identical
springs in a motionless elevator. The springs all have the same spring constant given
above.
What is the magnitude of the force the bottom spring exerts on the lower mass?
76.44
N Submit
+
3) What is the distance the middle spring is stretched from its equilibrium length?
60
cm
Submit
+
4) Now the elevator is moving downward with a velocity of v = -3.3 m/s but
accelerating upward at an acceleration of a = 4.9 m/s-. (Note: an upward
acceleration when the elevator is moving down means the elevator is slowing down.)
What is the magnitude of the force the upper spring exerts on the upper mass?
344
N Submit
+
5) What is the distance the lower spring is extended from its unstretched length?
cm
Submit
6) Finally, the elevator is moving downward with a velocity of v = -3.2 m/s but
accelerating downward at an acceleration of a = -2.7 m/s².
Compare the magnitude of the NET force on each mass:
F1 = F2 = F3
F1 > F2 > F3
oF2 > F3 > F1
Submit
+
7) What is the magnitude of the net force on the middle mass?
N Submit](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F95f665c9-89d4-4413-94f0-9f3c5db8ce6a%2F36e332fa-8435-406a-9623-cbbe5ed14e5f%2F4zxb7o_processed.png&w=3840&q=75)
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