Forces Between Masses (Grade 11 NSC Matric Physical Sciences): Quizzes

Attractive and non-contact

Direct to mass product, inverse to $d^2$

$F = G\frac{m_1 m_2}{d^2}$

$6.67 \times 10^{-11}$ N⋅m²⋅kg⁻²

Increases by factor of 100

$9.8$ m⋅s⁻² regardless of mass

Mass is constant; weight varies

kg for mass, N for weight

When no normal force acts, not no gravity

2× Earth weight