The masses are not attached to the spring. The l =g. After releasing the system from rest, the 5.0 contact with the spring. moving when it loses contact with the spring? ww

Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter8: Momentum And Collisions
Section: Chapter Questions
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14-15. Please help answer these two questions that relate to each other, thank you so much!! :))
(numbers 14-15) An ideal spring is initially compressed and placed between two masses on
a horizontal frictionless surface. The masses are not attached to the spring. The left mass is
5.0 kg and the right mass is 7.0 kg. After releasing the system from rest, the 5.0 kg mass
travels at 14.0 m/s when it loses contact with the spring.
14. How fast is the 7.0 kg mass moving when it loses contact with the spring?
a) 2.0 m/s
b) 4.0 m/s
c) 6.0 m/s
d) 8.0 m/s
e) 10.0 m/s
mur
15. How much potential energy did the spring release during this process?
a) 840 J
b) 790 J
c) 740 J
d) 690 J
e)
640 J
Transcribed Image Text:(numbers 14-15) An ideal spring is initially compressed and placed between two masses on a horizontal frictionless surface. The masses are not attached to the spring. The left mass is 5.0 kg and the right mass is 7.0 kg. After releasing the system from rest, the 5.0 kg mass travels at 14.0 m/s when it loses contact with the spring. 14. How fast is the 7.0 kg mass moving when it loses contact with the spring? a) 2.0 m/s b) 4.0 m/s c) 6.0 m/s d) 8.0 m/s e) 10.0 m/s mur 15. How much potential energy did the spring release during this process? a) 840 J b) 790 J c) 740 J d) 690 J e) 640 J
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