qwen3.5 wrote physics notes

notes/phys1/phys1_unit1.txt

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+== UNIT 1: KINEMATICS ==
+Scalars vs vectors: magnitude only vs magnitude+direction
+1D motion: track position, velocity, acceleration separately
+Slope of position-time = velocity
+Slope of velocity-time = acceleration
+Area under velocity-time = displacement
+Average velocity = total displacement / total time
+Constant acceleration: use kinematic equations
+Instantaneous velocity = slope of position-time at point
+Reference frames: relative velocity
+Vectors in 2D: add/subtract components, resolve angles
+Projectile: horizontal = constant velocity, vertical = constant acceleration
+Range = v_x*t, max height = v_y^2/(2g)
+Symmetry: time up = time down (launch/land same height)
+Acceleration always points down = g
+Equal time intervals: equal vertical displacement increments