IP_2020_L08_Exp01_Centripetal_Force Lab 2
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Experiment 1
Balancing Centripetal Force
Experiment Inventory
Materials
Aluminum Tube
(5) Washers
1 m Fishing Line Labware
Tape Measure
*Stopwatch/Timer
*Scissors
*Permanent Marker
You must provide items marked in *red
EXPERIMENT 1: BALANCING CENTRIPETAL FORCE
In this experiment, you will investigate how the magnitude of radius affects the time period of an object with circular motion.
PROCEDURE
1.
Measure out and cut one meter of fishing line. 2.
Tie a single metal washer around one end, and string the other end through the tube. Tie
four washers at the other end in a group (Figure 6). 3.
Measure 0.25 m from the single washer and use a permanent mark to mark this point on the
line. 4.
Hold the tube vertically at arm’s length to your side so that the washer near the mark is hanging from the top. 5. Hold a stopwatch in your other hand or get a willing participant to help you make time
measurements.
6. Begin swinging the tube so that the top washer rotates in a circle. Increasing the speed of
rotation (careful, not too fast!) should change the radius rotation. 7. Vary your speed until the mark you made on the line is at the top of the tube, making the radius Figure 6: Experiment setup of rotation 0.25 m. 8.
At this speed, time how long it takes to make 15 revolutions. Record your values in Table 1. 9.
Make a new mark at 0.40 m and repeat Steps 3 - 8.
10.Make a third mark at 0.15 m and repeat Steps 3 - 8 again.
©2018, eScience Labs
Data Sheet Experiment 1 Data Sheet
Table 1: Rotational Data
Radius (m)
Time per 15
Revolutions (s)
Period (s)
Expected Value
Percent Error (%)
0.25
9
0.40
10
0.15
8
©2018, eScience Labs
Pre lab questions.
1. In this lab, you will be rotating a mass on one side of a string that is balanced by a second mass on the other end of the string (Figure 5). Apply Newton's Second Law of Motion to mass 1, m1, and mass 2, m2, to solve for the period of mass 1.
a. Hint: assume m1= 4m2. How is the centripetal force on m1 related to the force of gravity on m2?
2. Draw a free body diagram and solve for the centripetal acceleration in terms of θ and g for one person riding on the amusement
park ride in Figure 3.
3. The around the world yo-yo trick is completed when you twirl a yo-yo in a vertical circle. If the yo-yo was in uniform circular motion, compare the force of tension at the top of the circle to the force of tension at the bottom of the circle.
a. Hint: Drawing a free body diagram will be helpful.
Post Lab questions
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LAB TESTS / Lab lest 3_20 Dec 21
Time left 0:26:46
Shear force diagrams can be used to determine
so that a given set of loads can be supported without structural
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ut of
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uestion
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ious page
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09:33 -
EN
佛示示品O
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A 71 kg man's arm, including the hand, can be modeled
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In raising both his arms, from hanging down to straight up, by how much does he raise his center of gravity?
Express your answer with the appropriate units.
HA
?
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9:-E
7490
*
اكتب اسمك الثلاثي
Your answer
Does the box will tip or not? and
Does the box will slip or not?
1 m
mass=50 kg
P = 100N
us=0.3
60
0.5 m
1 Add file
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