Chapter 3
Motion and Forces
Choose an origin, a positive direction and a time interval before describing how a body moves.
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Describe motion with a reference
Distinguish position, distance, displacement, speed, velocity and acceleration when motion reverses.
Read slopes, areas and changing acceleration
Represent motion graphically and use tangents and signed areas, including a curved velocity graph.
Derive and use constant-acceleration equations
Derive the straight-line equation family and choose valid signs and roots in a vertical-motion problem.
Inertia and linear momentum
Explain mass as inertia and calculate vector momentum and signed momentum changes.
Apply all three Newton laws
Distinguish balanced forces, momentum-change rates and simultaneous interaction partners.
From resultant force to motion
Use the constant-mass force model and infer acceleration from cart-position data.