Date: 1-5. In an experiment to determine the spring constant of an elastic cord of length 0.60 m, a student hangs the cord from a rod as represented above and then attaches a variety of weights to the cord. For each weight, the student allows the weight to hang in equilibrium and then measures the entire length of the cord. The data are recorded in the table below: Weight (N) 0 10 15 20 25 Length (m) 0.60 0.97 1.24 1.37 1.64

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Chapter7: Energy Of A System
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Problem 7.23P: A cafeteria tray dispenser supports a stack of trays on a shelf that hangs from four identical...
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AP Physics 1
Problem set #7
1-5. In an experiment to determine the spring constant of an elastic cord of length
0.60 m, a student hangs the cord from a rod as represented above and then
attaches a variety of weights to the cord. For each weight, the student allows the
weight to hang in equilibrium and then measures the entire length of the cord.
The data are recorded in the table below:
Weight (N) 0 10 15 20 25
Length (m) 0.60 0.97 1.24 1.37 1.64
1. Use the data to plot a graph of weight versus length on the axes below. Sketch a best-fit straight line
through the data.
30-
25-
20-
Weight (N)
15-
10-
0.5
Name: Alan S.
Date:
1.0
Length (m)
2. Use the best-fit line you sketched to determine an experimental value for the spring constant k of the cord.
points-(1,10), (1.4,20)
"slope = 10 - (254)
5. Determine the amount the cord has
1.5
ed
The student now attaches an object of unknown mass m to the cord and holds the
object adjacent to the point at which the top of the cord is tied to the rod, as shown.
When the object is released from rest, it falls 1.5 m before stopping and turning
around. Assume that air resistance is negligible.
3. Calculate the value of the unknown mass m of the object.
m² 10 = 25.
251
4. Determine the magnitude of the force in the cord when the mass reaches the equilibrium position.
[=k² $25.9-12.5AD
2.0
6. Calculate the speed of the object at the equilibrium position
the mass reaches the equili
position.
Transcribed Image Text:AP Physics 1 Problem set #7 1-5. In an experiment to determine the spring constant of an elastic cord of length 0.60 m, a student hangs the cord from a rod as represented above and then attaches a variety of weights to the cord. For each weight, the student allows the weight to hang in equilibrium and then measures the entire length of the cord. The data are recorded in the table below: Weight (N) 0 10 15 20 25 Length (m) 0.60 0.97 1.24 1.37 1.64 1. Use the data to plot a graph of weight versus length on the axes below. Sketch a best-fit straight line through the data. 30- 25- 20- Weight (N) 15- 10- 0.5 Name: Alan S. Date: 1.0 Length (m) 2. Use the best-fit line you sketched to determine an experimental value for the spring constant k of the cord. points-(1,10), (1.4,20) "slope = 10 - (254) 5. Determine the amount the cord has 1.5 ed The student now attaches an object of unknown mass m to the cord and holds the object adjacent to the point at which the top of the cord is tied to the rod, as shown. When the object is released from rest, it falls 1.5 m before stopping and turning around. Assume that air resistance is negligible. 3. Calculate the value of the unknown mass m of the object. m² 10 = 25. 251 4. Determine the magnitude of the force in the cord when the mass reaches the equilibrium position. [=k² $25.9-12.5AD 2.0 6. Calculate the speed of the object at the equilibrium position the mass reaches the equili position.
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