What keeps the stopper moving in a circle?
Purpose: Relate the variables involved in uniform circular motion
Hypothesis: I predict that the velocity of the stopper will increase as the radius is shortened.
Rubber stopper with a hole
PVC tube or wooden spool
1. Measure the mass f the stopper and washer, m, and record it in the data and observations section. Then, prepare the experimental apparatus as shown in figure A.
2. Throughout this experiment, you will need to maintain a constant radius of uniform circular motion while ensuring that all of the centripetal force is provided by the clamp and measured on the spring scale. Practice whirling the stopper in a horizontal plane until you can keep the paper clip a short
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2. As the radius increases so does the speed of the stopper.
3. Analysis the resulting plot. Is there a pattern? If so what does the pattern mean?
4. Formulate an equation for the relationship between the spring force and the centripetal acceleration of the stopper. What does this equation tell you about the spring force?
This shows that the spring force is in direct relation to the centripetal force.
5. Justify the method of recording time for 30 rev to minimize the error associated with calculating the speed of the stopper. In other labs you have used multiple data runs and averaged the data to minimize the random error associated with measuring. Why did you not have to do that on
5. To get the most accurate time we had the person timing also count the revolutions of the stopper. And we didn’t have to do multiple data runs because the time is the least important
In this lab we found that the variables of circular motion are directly related. We accomplished our goal which was to relate the variables involved in uniform circular motion. I also proved my hypothesis incorrect, my hypothesis was that the velocity of the stopper will increase as the radius is shortened, which in fact as the radius was shortened the velocity decreased. In this lab there were several sources of error, the stopper was spinning so fast we may have miss counted how many revolutions it had, and the force was not constant the
Loosen the retaining screw and adjust the horizontal arm to the dimple that produce the 2nd largest radius between the spinning mass and the rotating shift. Allow the spinning mass to hang straight down, without being connected to the spring. Position the pointer directly below the tip of spinning mass and secure the pointer to the base. Use the scale located on the base to determine the radius, r, of the pointer from the rotating shaft. Record this value onto Data Sheet A. The experimental uncertainty in r is estimated to be the width of the spinning mass tip – approximately 0.2 cm.
Circular motion is one of the fundamental building blocks for understanding the physical world because it is so common. This interactive lets you examine the basic ideas of kinematics and forces for objects moving in circular motion.
1. Move the lid of the container up or down. Record the resulting volume and pressure
This experiment has, in fact, proven my hypothesis to be incorrect, after looking through the results, I now understand why. My hypothesis stated that
Procedure 1. Obtain 7 test tubes and stoppers from the instructor. Label each vial L1, L2, L3, D1, D2, D3 and N1. 2. Cut 7 cotton balls in half and place each wad in the bottom of each vial by using the wooden stick to push it down.
We set up 3 fermentation set-ups, labeling them 1, 2, and 3. Then, filled a tub with hot water and inserted the end of the plastic tubing into one of the test tubes and submerged the collection tube and plastic tubing in the tub. After that, we mixed the fermentation solutions for the other tubes, (tube 1 got 4mL of water and 3mL of corn syrup, tube 2 got 3 mL of water, 1 mL of yeast and 3 mL corn syrup, tube 3 got 1 mL water, 3 mL yeast and 3 mL of corn syrup) . We then mixed each test tube and put the rubber stoppers in the fermentation tubes. Finally, we marked the water level on each collection tube with a wax pencil to use as the baseline. Then at 5 minute intervals we measured the distance from the baseline for 20 minutes.
Introduction: The acceleration toward the center that keeps objects in uniform circular motion (circular motion at a constant speed) is called centripetal acceleration. An understanding of centripetal acceleration was one of the key elements that led to Newton’s formulation of the law of universal gravitation.
The purpose of this experiment was to create a model that showed the motion of a spinning body and to test the accuracy of said model. The model was created by calculating the measurements of the orbital period of a stopping mass for six varying mass ratios and then comparing them to the model equation derived from the equation for centripetal force. The primary results of the lab were in agreement with the predicted values, therefore our degree of confidence in our data was high.
4.) Have one person reading the ammeter, one person timing the weights reaching the top of the motor, and the
Determine the 1-RM within at least four times including resting time of three to five minutes between each trail.
6. The outflow rate is measured by using a measuring cylinder. It is measured 3 times and averaged for a more accurate result. The results are shown in Table 2.
Winthrow’s research incorporates atypical variables into his study, that other researchers did not incorporate, such as: duration of stop, physical resistance during the stop, number of
The goal of this experiment was to show the difference in centripetal velocity of the rubber stopper as the weight changed between the rubber stopper, Msb, and the circular weight, MH. Centripetal force is the net force pointing from the body toward a fixed center of curvature. In other words, centripetal force can be defined as the net force that is central seeking and radial, causing a curved motion to an object. The objective of this experiment is to study motion, with the concept of centripetal force of a spinning object on the end of a string. As the string rotates around the apparatus the string follows the
A volumetric pipette & measuring cylinder can be calibrated by just weighing the water they deliver. As for volumetric flask, the weight of an empty flask is recorded. Next, weigh the flask after filling it with water to the mark.
It is evident that the physical parameters, such as the Coriolis rotation ( (-- removed HTML --)