Formula
Definition of Formula

• A Formula is an Expression or Equation that expresses the relationship between certain quantities.
  For example, A = πr² is the Formula to find the Area of a Circle of Radius r units.
  From this formula, we can know the relationship between the Radius and the Area of a circle. The Area of a Circle varies directly as the square of its radius. Here π is the constant of variation.

Solved Example on Formula

A ball is dropped from a Height h ft above the ground. The Formula alt="" /> describes the Velocity with which the ball reaches the ground in ft/sec. Find V when h = 16 ft.
Choices:
A. 64 ft/sec
B. 128 ft/sec
C. 16 ft/sec
D. 32 ft/sec
Correct Answer: D
Solution:
Step 1: Substitute h = 16 in the Formula alt="" />.
Step 2: We get, V = 32 ft/sec for h = 16 ft.

Related Terms for Formula

• Expression
• Equation

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