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

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Chapter1: Units, Trigonometry. And Vectors
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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
Transcribed Image Text: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
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