courses:phy101:3
Table of Contents
3. Newton's laws
1. Force
2. First law
Inertial reference frame.
Equilibrium.
3. Second law
Momentum form.
4. Third law
5. Law of gravitation
$$ \mathbf{F}_{12} = \frac{Gm_1m_2}{r^2} \hat{r}_{12} $$
$$ \mathbf{g} = \frac{GM}{r^2} \hat{r} $$
Einstein
6. Inertial and gravitational mass
Inertial mass
$$ m_i = \frac{F}{a}. $$
Gravitational mass
$$ m_g = \frac{F_g}{g}. $$
7. Application of Newton's laws
Using free-body diagrams without friction.
Friction
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