Question 1

What is the difference between force and mass?

Accepted Answer

Mass measures amount of matter (kg). Force measures push/pull (N). Weight is the gravitational force on mass: F = mg.

Question 2

Why are there so many force units?

Accepted Answer

Different systems developed independently—SI (newtons), Imperial (pound-force), CGS (dynes), gravitational (kgf).

Question 3

What's the difference between force and pressure?

Accepted Answer

Force (newtons) is a push or pull. Pressure (pascals) is force per unit area. Same force over smaller area = higher pressure.

Question 4

Why do we need different force units?

Accepted Answer

Newtons are SI standard. Pounds-force connects to everyday weight. Dynes (CGS) are used in some scientific fields. Each suits different applications.

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