A negative ion of charge -2e is located at the origin and a second negative ion of charge -3e is located nearby at x = 3.8 nm , y = 3.2 nm . Part A Find the force on the ion of charge -2e. Express your answer in vector components, separated by commas, using two significant figures.

Respuesta :

Answer:

[tex]F = 5.6 \times 10^{-11} N[/tex]

[tex]F_x = 4.28\times 10^{-11} N[/tex]

[tex]F_y = 3.61\times 10^{-11} N[/tex]

Explanation:

Magnitude of the force on -2e charge due to another charge -3e is given as

[tex]F = \frac{kq_1q_2}{r^2}[/tex]

here we will have

[tex]F = \frac{(9\times 10^9)(2e)(3e)}{(3.8^2 + 3.2^2)\times 10^{-18}}[/tex]

[tex]F = 5.6 \times 10^{-11} N[/tex]

now for the two components of the force we know that this force always along the line joining two charges

so we will have

[tex]tan\theta = \frac{y}{x}[/tex]

[tex]\theta = tan^{-1}\frac{3.2 nm}{3.8 nm}[/tex]

[tex]\theta = 40.1 degree[/tex]

now the two components of above force will be

[tex]F_x = Fcos\theta[/tex]

[tex]F_x = (5.6\times 10^{-11})cos40.1[/tex]

[tex]F_x = 4.28\times 10^{-11} N[/tex]

[tex]F_y = Fsin\theta[/tex]

[tex]F_y = (5.6\times 10^{-11})sin40.1[/tex]

[tex]F_y = 3.61\times 10^{-11} N[/tex]