Question

Задача з фізики. 50 БАЛІВ!! Два заряди -4 нКл і 5 нКл розташовані на відстані 3 см один від одного. Визначте силу притягання між ними.

Answer 1

Ответ:

Объяснение:

Дано:          CI            Розв`язання

q1= -4 нКл  -4*10^-8    F=k* |q1| * |q2| / r^2

q2= 5 нКЛ   5*10^-8    F= 9*10^9 * 4*10^-8*5*10^-8/ (3*10^-3)^2=    

r= 3 см          3*10^-3   = 9*10^9*2/9*10^9=2 H

k= 9*10^9                      F=2H

Зн:                                

F=?

Answer 2

To calculate the force of attraction between two charges, we can use Coulomb's Law. Coulomb's Law states that the force between two charges is directly proportional to the product of their magnitudes and inversely proportional to the square of the distance between them.

In this case, we have two charges: -4 nC and 5 nC, separated by a distance of 3 cm. Let's calculate the force of attraction between them.

Given:

Charge 1 (q1) = -4 nC Charge 2 (q2) = 5 nC Distance (r) = 3 cm = 0.03 m

Calculating the force of attraction:

Using Coulomb's Law, the formula to calculate the force of attraction (F) is:

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

Where: - F is the force of attraction - k is the electrostatic constant, approximately equal to 9 × 10^9 N·m^2/C^2 - |q1| and |q2| are the magnitudes of the charges - r is the distance between the charges

Let's substitute the given values into the formula and calculate the force:

F = (9 × 10^9 N·m^2/C^2) * ((|-4 nC|) * (|5 nC|)) / (0.03 m)^2

Calculating the magnitudes of the charges: |-4 nC| = 4 nC |5 nC| = 5 nC

Substituting the values into the formula: F = (9 × 10^9 N·m^2/C^2) * (4 nC * 5 nC) / (0.03 m)^2

Simplifying the equation: F = (9 × 10^9 N·m^2/C^2) * (20 nC^2) / (0.03 m)^2

Converting nC to C: 1 nC = 1 × 10^-9 C 20 nC = 20 × 10^-9 C = 2 × 10^-8 C

Substituting the values into the equation: F = (9 × 10^9 N·m^2/C^2) * (2 × 10^-8 C^2) / (0.03 m)^2

Simplifying further: F = (9 × 10^9 N·m^2/C^2) * (2 × 10^-8 C^2) / (0.03 m)^2

Calculating the square of 0.03 m: (0.03 m)^2 = 0.0009 m^2

Substituting the values into the equation: F = (9 × 10^9 N·m^2/C^2) * (2 × 10^-8 C^2) / 0.0009 m^2

Calculating the numerator: (9 × 10^9 N·m^2/C^2) * (2 × 10^-8 C^2) = 18 × 10^1 N·m^2 = 18 N·m^2

Substituting the values into the equation: F = 18 N·m^2 / 0.0009 m^2

Calculating the division: 18 N·m^2 / 0.0009 m^2 = 20000 N

Therefore, the force of attraction between the two charges is 20000 N.

Please note that the above calculation assumes that the charges are point charges and that there are no other charges or objects nearby that could affect the force.