Why this chapter matters
Clear motion models are the base for every later unit, including forces, energy, and momentum.
What you will learn
- Interpret and connect position-time, velocity-time, and acceleration-time graphs.
- Solve constant-acceleration problems with correct signs, units, and known assumptions.
- Model projectile motion by separating horizontal and vertical components.
Lessons in this chapter
- Position, displacement, and velocityDistinguish vector and scalar ideas and interpret motion direction from signs and graphs.
- Acceleration and motion graphsRelate slope and area on motion graphs to physical quantities.
- Constant-acceleration equationsChoose and apply kinematic equations from known and unknown variables.
- Projectile motionRepresent 2D motion with independent horizontal and vertical models.
Study task
A ball is launched horizontally from a table. Create a diagram of known quantities, write separate horizontal and vertical equations, and estimate time of flight and horizontal range for a chosen table height and launch speed.
Chapter checkpoint
A car starts from rest and accelerates at 2.0 m/s^2 for 5.0 s. What is its final velocity?
Use v = v0 + at. With v0 = 0, v = 0 + (2.0)(5.0) = 10 m/s.