A mass of m = 0.500 kg slides across a horizontal frictionless counter with a speed vo= 0.300 m/s. It then runs into and compresses a spring of spring constant k-750 N/m. mi d O Weight, Normal, Spring Force, Friction O Weight, Spring Force, Friction O Weight, Normal, Spring Force O Weight, Normal, Friction Physics Principles (a) Pick all forces act on the spring-mass system as the mass compresses the spring. (b) Which of these forces do not do any work? O Weight, Normal Force, Spring Force O Weight, Normal Force Normal, Spring Force O Weight, Friction -VO m

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Chapter7: Energy Of A System
Section: Chapter Questions
Problem 7.15OQ: A cart is set rolling across a level table, al the same speed on every trial. If it runs into a...
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(c) Are the remaining forces conservative or non-conservative?
O Conservative
O Non-Conservative
(d) What can you say about the mechanical energy of the system?
Only
mechanical energy is
Think & Prepare
Method 1: Conservation of mechanical energy
1. From the parts (a) to (d), is mechanical energy of the mass conserved? Can you you set-up a
mathematical equation using conservation of energy at the two locations - 1. the spring is not
compressed and 2. the spring is completely compressed.
Method 2: Work - Energy Theorem
1. Can you find the net work on the mass due to all forces? Can you mathematically set-up the work-
energy theorem relating the net work and change in KE of the mass?
are responsible for work in the spring-mass system. Therefore,
(e) When m is momentarily stopped by the spring, by what distance d is the spring compressed?
Enter to 3 significant figures
d =
cm
Transcribed Image Text:(c) Are the remaining forces conservative or non-conservative? O Conservative O Non-Conservative (d) What can you say about the mechanical energy of the system? Only mechanical energy is Think & Prepare Method 1: Conservation of mechanical energy 1. From the parts (a) to (d), is mechanical energy of the mass conserved? Can you you set-up a mathematical equation using conservation of energy at the two locations - 1. the spring is not compressed and 2. the spring is completely compressed. Method 2: Work - Energy Theorem 1. Can you find the net work on the mass due to all forces? Can you mathematically set-up the work- energy theorem relating the net work and change in KE of the mass? are responsible for work in the spring-mass system. Therefore, (e) When m is momentarily stopped by the spring, by what distance d is the spring compressed? Enter to 3 significant figures d = cm
A mass of m = 0.500 kg slides across a horizontal frictionless counter with a speed vo= 0.300 m/s. It
then runs into and compresses a spring of spring constant k-750 N/m.
୪୪୪୩
d
O Weight, Normal, Spring Force, Friction
O Weight, Spring Force, Friction
O Weight, Normal, Spring Force
O Weight, Normal, Friction
Physics Principles
(a) Pick all forces act on the spring-mass system as the mass compresses the spring.
(b) Which of these forces do not do any work?
C
C
-VO
Weight, Normal Force, Spring Force
Weight, Normal Force
Normal, Spring Force
Weight, Friction
m
Transcribed Image Text:A mass of m = 0.500 kg slides across a horizontal frictionless counter with a speed vo= 0.300 m/s. It then runs into and compresses a spring of spring constant k-750 N/m. ୪୪୪୩ d O Weight, Normal, Spring Force, Friction O Weight, Spring Force, Friction O Weight, Normal, Spring Force O Weight, Normal, Friction Physics Principles (a) Pick all forces act on the spring-mass system as the mass compresses the spring. (b) Which of these forces do not do any work? C C -VO Weight, Normal Force, Spring Force Weight, Normal Force Normal, Spring Force Weight, Friction m
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