Static Electricity -06- Resultant Coulomb Force

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Three charges with magnitudes 0.8 μC, -0.6 μC, and 0.5 μC are placed at the three corners A, B, and C of an equilateral triangle with sides of 4 cm. Find the electric force on the charge at vertex C due to the other two charges.  Watch the video related to *STATIC ELECTRICITY* : https://dailymotion.com/playlist/x80pkv  By following this channel it is very useful for the development of this channel. The Dailymotion application is easy to install on any smartphone, and does not take up much memory space.

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00:00Hi friends, no one can force you to learn except yourself.

00:05Keep up the enthusiasm for learning.

00:10Charged particles are located at the corner points of an equilateral triangle.

00:15Now, we are asked to find the magnitude of the resultant Coulomb force on one of the charges at the corner point.

00:24Here is an equilateral triangle.

00:26This triangle has three corner points.

00:33At each point there is a charge.

00:36Charge 1 is at point A, charge 2 is at point B, and charge 3 is at point C.

00:44The Coulomb force is formed from the interaction of two electrically charged particles.

00:50Because there are three electrically charged particles, each particle will get two Coulomb forces, as will particle 3.

00:56The charge signs of particles 1 and 3 are the same, so the direction of the Coulomb force on particle 3 is away from particle 1.

01:09Because the Coulomb force is a central force, the direction of the Coulomb force will be in line with the line connecting point 1 and point 3.

01:16Almost forgot, the length of each side of the triangle is R.

01:25The magnitude of the force F31 is KQ1Q3 over R squared.

01:29The values of some quantities can be seen in the problem sheet.

01:38F31 is about 2.25 Newton.

01:44The charge signs of particle 3 and particle 2 are different, so the direction of the Coulomb force on particle 3 is towards particle 2.

01:51F32 is also in line with the line connecting point 2 and point 3.

01:59The magnitude of the force F32 is KQ2Q3 over R squared.

02:06What is important to note, when we have known the direction of the force,

02:10the charge value during the calculation process is always positive regardless of the sign.

02:15F32 is 1.69 Newton.

02:23It is clear that on particle 3 there are two forces acting simultaneously.

02:30Several forces acting on the same object have a resultant force.

02:35I think we have learned vector physics.

02:38Through the parallelogram method, we can draw the resultant vector FR.

02:42The magnitude of the vector FR is what we want to calculate.

02:49Mathematically, FR is equal to the square root of F31 plus F32 squared plus 2F31F32 cosine of beta.

03:00The angles in every equilateral triangle are equal.

03:04The value of this angle is 60 degrees.

03:06Two complementary angles have an angle of 180 degrees.

03:14So this angle is 120 degrees.

03:17Beta is equal to 120 degrees.

03:22We can use a scientific calculator.

03:25FR is about 2.03 Newtons.

03:27This is the magnitude of the resultant vector acting on particle 3.

03:36Happy learning everyone!

03:38Atlas actually is one.

03:45But it could do a slight difference.

03:48It doesn't follow up currently.

03:49Do you find references?

03:50Perhaps us.

03:52Go ahead!

03:53τ

03:57mais

04:01There you go.

04:04schodd

04:04Food

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