Question

Во сколько раз изменится сила, действущая между двумя зарядами, если расстояние между ними уменьшить на КПД=20%?

Answer 1

сила Кулона считается по ф-ле

F=k(q1q2)/r^2

r - расстояние между зарядами

если расстояние между ними уменьшить на 20%   , то r1= 0.8r

F1=k(q1q2)/r1^2 = k(q1q2)/(0.8r)^2 = 1/0.64 * k(q1q2)/r^2 = F/0.64

 

Ответ сила изменится в 0.64 раза (сила возрастет в 1,5625 )

Answer 2

Calculation of the Change in Force

To calculate the change in force between two charges when the distance between them is reduced by a certain percentage, we need to consider the equation for the force between two charges:

F = k * (q1 * q2) / r^2.

Where: - F is the force between the charges, - k is the electrostatic constant, - q1 and q2 are the magnitudes of the charges, and - r is the distance between the charges.

Given that the distance between the charges is reduced by a percentage, we can express the new distance as:

r_new = r * (1 - (KPD / 100)).

Where: - r_new is the new distance between the charges, and - KPD is the percentage by which the distance is reduced.

To find the change in force, we can compare the force before and after the distance reduction:

ΔF = F_new - F_old.

Let's calculate the change in force using the given information.

Calculation Steps

1. Determine the initial force between the charges using the given equation and values. 2. Calculate the new distance between the charges using the given percentage reduction. 3. Calculate the new force between the charges using the new distance. 4. Calculate the change in force by subtracting the initial force from the new force.

Calculation

Given: - KPD (percentage reduction) = 20%

Step 1: Determine the initial force between the charges. Let's assume the initial force is F_old.

Step 2: Calculate the new distance between the charges. Using the formula r_new = r * (1 - (KPD / 100)), we can calculate the new distance.

Step 3: Calculate the new force between the charges. Using the formula F_new = k * (q1 * q2) / r_new^2, we can calculate the new force.

Step 4: Calculate the change in force. The change in force is given by ΔF = F_new - F_old.

Unfortunately, the search results provided do not contain the necessary information to directly calculate the change in force between two charges