Calculating Net Force: A Step-by-Step Guide

In summary, the net force on A can be calculated by using the equation F=k(qA qB)/(AB)^2 for force F(B) and F(C), and then adding them together. The value of F is (9*10^9 Nm^2/C^2)(1,6 x 10^-6C)(1,4 x 10^-6C) / 1,7mm^2+(9*10^9 Nm^2/C^2)(1,6 x 10^-6C)(7,2 x 10^-6C) / 3,4mm^2. It is important to superpose (add) these two forces to get the correct result.
  • #1
Kofyebs
12
2

Homework Statement


Calculate the net force on A.[/B]
upload_2016-5-20_20-4-1.png

Homework Equations


F=k . (q1 q2)/r^2 , k=9 x 10^9 Nm^2/C^2[/B]

The Attempt at a Solution


(9*10^9 Nm^2/C^2)(1,4 x 10^-6C)(7,2 x 10^-6C) / 1,7mm^2
= 0,0313.
Could someone tell me what I am missing even if what i did is even correct.
Thanks
[/B]
 
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  • #2
That’s NOT how you do it!
You add:
F(B)=k (qA qB)/(AB)^2 and F(C)=k (qA qC)/(AC)^2
As I said before, you ’superpose
’ (add) these 2 forces.
Do you understand now?
 
  • #3
Poster has been reminded not to do too much of the student's work for them...
F=(9*10^9 Nm^2/C^2)(1,6 x 10^-6C)(1,4 x 10^-6C) / 1,7mm^2+(9*10^9 Nm^2/C^2)(1,6 x 10^-6C)(7,2 x 10^-6C) / 3,4mm^2
 
  • #4
Yes! I understand now. Thanks once again. you've saved me. ;)
 

What is net force?

Net force is the overall force acting on an object, taking into account all the individual forces acting on it.

How do you calculate net force?

To calculate net force, you need to add up all the individual forces acting on an object. If the forces are acting in the same direction, you can simply add them together. If they are acting in opposite directions, you need to subtract the smaller force from the larger one.

What is the formula for calculating net force?

The formula for calculating net force is Fnet = ΣF, where Fnet is the net force and ΣF is the sum of all the individual forces.

What are some examples of net force?

Some examples of net force include pushing a shopping cart, throwing a ball, or pulling a wagon. In each of these situations, there are multiple forces acting on the object, resulting in a net force.

How does net force affect an object's motion?

Net force affects an object's motion by causing it to accelerate in the direction of the net force. If the net force is zero, the object will remain at rest or continue to move at a constant speed.

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