Free Fall & Motion Graphs
Kinematics (Constant a)
Equations
v = u + a ts = u t + ½ a t²v² = u² + 2 a s
Worked Example
Throw up: u=14, a=−9.8. Top time t=14/9.8≈1.43 s; height ≈10 m.
Graph Reminders
- s–t slope ⇒ velocity; v–t slope ⇒ acceleration; v–t area ⇒ displacement.
- Negative v region ⇒ opposite direction.
Common Mistakes
- Using wrong sign for
g. - Mixing speed vs velocity on signed graphs.