# Two charges of # -6 C # and # 4 C# are positioned on a line at points # -2 # and # 9 #, respectively. What is the net force on a charge of # -1 C# at # 1 #?

Consider the figure. Let the charges

Let the positions at which charges are placed be in the units of meters.

Let

From figure

Let

From figure

Let

This force is repulsive and is towards charge

Let

This force is attractive and is towards charge

The total force or net force on charge

Since the above two forces

Let

Since

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Calculate the electrostatic force between each charge and the charge at position 1, then find the net force by considering both magnitudes and directions. Use Coulomb's Law: ( F = k \frac{q_1 q_2}{r^2} ), where ( k ) is Coulomb's constant ((8.99 \times 10^9 \ \text{N m}^2/\text{C}^2)), ( q_1 ) and ( q_2 ) are the charges, and ( r ) is the distance between them.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

- Two charges of # -2 C # and # 3 C# are positioned on a line at points # 3 # and # 4 #, respectively. What is the net force on a charge of # -9 C# at # 0 #?
- A charge of #12 C# passes through a circuit every #8 s#. If the circuit can generate #8 W# of power, what is the circuit's resistance?
- When does your body conduct current more readily?
- A charge of #16 C# passes through a circuit every #8 s#. If the circuit can generate #36 W# of power, what is the circuit's resistance?
- Two charges of # -6 C # and # 4 C# are positioned on a line at points # -5 # and # -2 #, respectively. What is the net force on a charge of # 3 C# at # 1 #?

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