# Finding the Angle between Thread and Wall for Sphere A

• Andrea Assas
In summary, the problem involves a sphere A with a mass of 4.2X10^-2 kg, tethered to a wall by a thin thread. Sphere A has an excess of 1.2X10^12 electrons, while sphere B has an excess of 3.5X10^12 electrons. The distance between A and B is 0.23m. The task is to find the angle between the thread and the wall by identifying all the forces on sphere A and drawing a force diagram.

#### Andrea Assas

1. The problem statement, all variables and given/known
Sphere A has a mass=4.2X10^-2 kg and iA tethered to a wall by a thin thread.
Excess of electrons for A=1.2X10^12
Excess of electrons for B=3.5X10^12
Distance between A and B=0.23m
find the angle between the thread and the wall

## The Attempt at a Solution

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Andrea Assas said:
1. The problem statement, all variables and given/known
Sphere A has a mass=4.2X10^-2 kg and iA tethered to a wall by a thin thread.
Excess of electrons for A=1.2X10^12
Excess of electrons for B=3.5X10^12
Distance between A and B=0.23m
find the angle between the thread and the wall

## The Attempt at a Solution

This might sound picky, but this problem really isn't "Advanced Physics". You need to identify all the forces on sphere A and figure out what angle makes all the forces balance. Draw a force diagram.

## 1. What is the purpose of finding the angle between thread and wall for Sphere A?

The purpose of finding the angle between thread and wall for Sphere A is to determine the position and orientation of the sphere in relation to the wall. This information can be useful in various scientific experiments and studies, such as calculating forces acting on the sphere or analyzing the sphere's motion.

## 2. How is the angle between thread and wall for Sphere A measured?

The angle between thread and wall for Sphere A can be measured using a protractor or angle measuring device. The thread is attached to the sphere and the protractor is placed along the wall, with the vertex at the point where the thread meets the wall. The angle can then be read from the protractor.

## 3. What factors can affect the angle between thread and wall for Sphere A?

The angle between thread and wall for Sphere A can be affected by the length and tension of the thread, the shape and weight distribution of the sphere, and any external forces acting on the sphere. Additionally, the type of surface the wall is made of can also influence the angle.

## 4. Why is it important to find the angle between thread and wall for Sphere A accurately?

Accurately finding the angle between thread and wall for Sphere A is important because it can affect the accuracy of any calculations or conclusions drawn from the data. In scientific experiments, even small errors in measurement can lead to significant discrepancies in results. Therefore, it is crucial to ensure precise measurement of the angle.

## 5. Are there any alternative methods for finding the angle between thread and wall for Sphere A?

Yes, there are alternative methods for finding the angle between thread and wall for Sphere A. One method is using a laser level to project a straight line onto the wall, and then measuring the angle between the thread and the line. Another method is using a digital angle finder tool, which can provide more precise measurements than a protractor. However, these methods may require additional equipment and may not be suitable for all situations.