### Electrostatic Potential And Potential Energy

**Concepts for Easy Recall:**

**Concept:** Absolute Value

- Remember the absolute value as the magnitude, size, or distance of a number without considering its sign (positive or negative).

**Concept:** Arc Length

- Imagine arc length as the distance measured along the circumference of a circle or arc, often represented by the Greek letter “s” and related to the central angle in radians.

**Concept:** Centripetal Force

- Centripetal force is a force that pulls an object towards the center of a circular path, keeping it in a circular motion. Remember it as the force that keeps objects like satellites orbiting planets or cars on curved roads.

**Concept:** Complementary Angles

- Complementary angles are two angles whose sum is exactly 90 degrees. Memorize this as angles that complete a right angle.

**Concept:** Converse of the Pythagorean Theorem

- The converse of the Pythagorean Theorem states that if the squares of the lengths of two sides of a triangle are equal to the square of the length of the third side, then the triangle is a right triangle. Remember this as the reverse condition for right triangles.

**Concept:** Derivative

- Think of the derivative as the rate of change of a function with respect to its input, showing how the output changes as the input changes.

**Concept:** Exponential Function

- An exponential function is a function of the form y = a^x, where “a” is a positive constant and “x” is the variable. Memorize this as a function where the output increases or decreases rapidly as the input changes.

**Concept:** Imaginary Number

- Imaginary numbers are those that can be represented as a multiple of the imaginary unit “i,” where i = √(-1). Remember them as numbers that involve the square root of negative one.

**Concept:** Law of Sines

- The Law of Sines relates the ratios of the lengths of the sides of a triangle to the sines of the angles opposite those sides. Remember it as a way to solve for unknown angles and lengths in triangles.

**Concept:** Multiplication Principle

- The multiplication principle states that if there are “m” ways to do one thing and “n” ways to do another, then there are “m × n” ways to do both things. Memorize this as a way to determine the total number of possible outcomes when combining events or actions.