![]() Conclusion: This lab was utilized to compare Coulomb's Law with data obtained with graphical analyses. As the 1/r 2 increased, the static force also increased, representing a direct relationship. This represents a positive correlation of static force and 1/r 2. In the second graph comparing Fstatic (N) on the vertical axis and 1/r 2 (1/m 2 ) on the horizontal axis, there is an increasing linear line. As distance increased, the static force decreased. This represents a negative correlation of static force and the distance between the balloon and pith ball. Graphs Results: - In the first graph comparing Fstatic (N) on the vertical axis and r(m) on the horizontal axis, there is a decreasing line with a slight curve. Write a formal lab report that includes answers to the analysis questions. Apply a linear trend to see if Coulomb's Law is true. Create a graph with Fstatic as the vertical (y) axis and 1/r^2 as the horizontal (x) axis. Create a graph with Fstatic as the vertical (y) axis and r as the horizontal (x) axis. The value of g is 9.8 N/kg, and the mass of the pith ball is. Calculate the Fstatic values for each r value point using the equation Fstatic=(mg) (d/l). Change the value r and measure the new resulting d. Put the balloon a distance r from the pith ball and the ball should repel by a horizontal distance of d from its initial position. Once data collection begins, do not change the charge on the balloon or the pith ball. Tap the balloon to the pith ball, making sure that the balloon is the only item that touches the pith ball. Inflate the balloon and rub it on hair to give it the net-negative charge. Using a ruler, measure the vertical distance between the surface where the fishing line is attached to the surface and the pith ball. Tape both ends of the string to a horizontal surface, making sure the pith ball is vertical in the middle of the string. Hang the Pith Ball in the center of the string, making sure the pith ball is hanging vertically in the center of the string, with equal distances on each end of the string with no angle. ![]() Procedures: - Required Materials: o Balloon o Fishing Line o Needle o Pith Ball (Mass 0.15g) o Tape o Ruler o Hair o Video Recording Device - Apparatus: o Lab Kit:ΔΆ. Due to the negative charges on both objects, the balloon should repel the pith ball and the graph made of the relationship of Fstatic and 1/r^2 should demonstrate a linear relationship with Coulomb's Law. Graphs will be utilized to compare the final relationship with Coulomb's Law. ![]() In order to calculate the final Fstatic value, the r, d, and L values will be calculated as shown in the Fstatic equation above and for 1/r^2. In this, both objects should be negatively charged, and the like charges will repel each other. Without direct contact, the pith ball and balloon should repel each other because the charged balloon will carry a static-electric force that repels onto the pith ball. In this experiment, a pith ball will be hung from a horizontal surface so that is can be pushed by a charged balloon. Additionally, Newton's Law will be applied in the vertical direction to find the Fy and to further calculate Fstatic in which the equation is Fstatic= (mg)(d/L). In this equation, Fe is force, k is the Coulomb's constant, q are the two separate charges, and r is the distance (Rio Salado, PHY 112 Lesson 1). Coulomb's law can also be used to find force, distance, or charge with the formula Fe=kqq/r^2. ![]() In order for this to be true, the second graph of this lab will be linear. Additionally, it is inversely proportional to the square of separation distance between the two objects. ![]() Coulomb's Law states that the magnitude of electrostatic force regarding attraction or repulsion between two-point charges is directly proportional to the quantity of charge on the objects. The data obtained will be used to compare the relationship with Coulomb's Law with graphical analysis. Name: Rylee Johnson Class: PHY 112 #23136 Date: FebruLab #1 Coulomb's Law Lab Purpose: This lab is utilizing data to identify the connection between the distance between two charges particles and static-electric force. ![]()
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