Question

in the formula ( f = m cdot a ), m is :

○ a unit

○ a variable

○ velocity

○ my idea

Explanation:

The formula \( F = m \cdot a \) is Newton's second law of motion, where \( F \) represents force, \( m \) represents mass, and \( a \) represents acceleration. In a formula, symbols like \( m \) here are variables (quantities that can take different values, in this case, different masses). A unit would be something like kilogram (for mass), not the symbol \( m \). Velocity is represented by \( v \) (or other symbols) and is not \( m \). "My idea" is not a scientific term related to this formula. So \( m \) is a variable.

Answer:

B. a variable