Question 1

What is gravitational force?

Accepted Answer

The attractive force between masses. F = Gm₁m₂/r², where G = 6.674×10⁻¹¹ N⋅m²/kg² is the gravitational constant.

Question 2

How much gravitational force do humans exert?

Accepted Answer

Two 70 kg people 1 meter apart attract with about 3.3×10⁻⁷ N—millions of times weaker than their weight.

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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