Two equally charged tiny spheres of mass 1.0 g are placed 2.0 cm apart. When released, they begin to accelerate away from each other at 414 m/s2. What is the magnitude of the charge on each sphere, assuming only that the electric force is present?

Respuesta :

Answer:

The magnitude of the charge on each sphere is 0.135 μC

Explanation:

Given that,

Mass = 1.0

Distance = 2.0 cm

Acceleration = 414 m/s²

We need to calculate the magnitude of charge

Using newton's second law

[tex]F= ma[/tex]

[tex]a=\dfrac{F}{m}[/tex]

Put the value of F

[tex]a=\dfrac{kq^2}{mr^2}[/tex]

Put the value into the formula

[tex]414=\dfrac{9\times10^{9}\times q^2}{1.0\times10^{-3}\times(2.0\times10^{-2})^2}[/tex]

[tex]q^2=\dfrac{414\times1.0\times10^{-3}\times(2.0\times10^{-2})^2}{9\times10^{9}}[/tex]

[tex]q^2=1.84\times10^{-14}[/tex]

[tex]q=0.135\times10^{-6}\ C[/tex]

[tex]q=0.135\ \mu C[/tex]

Hence, The magnitude of the charge on each sphere is 0.135μC.

Answer:

Charge, [tex]q=1.35\times 10^{-7}\ C[/tex]

Explanation:

It is given that,

Mass of spheres, m = 1 g = 0.001 kg

Distance between spheres, r = 2 cm = 0.02 m

Acceleration when they released, [tex]a=414\ m/s^2[/tex]

We need to find the magnitude of the charge on each sphere. The electric force is given by :

[tex]F=\dfrac{kq^2}{r^2}[/tex]              

Also, F = ma

[tex]ma=\dfrac{kq^2}{r^2}[/tex]        

[tex]q^2=\dfrac{mar^2}{k}[/tex]

[tex]q^2=\dfrac{0.001\times 414\times (0.02)^2}{9\times 10^9}[/tex]      

[tex]q=1.35\times 10^{-7}\ C[/tex]

So, the magnitude of charge on each spheres is [tex]1.35\times 10^{-7}\ C[/tex]. Hence, this is the required solution.