Find the net force
Combine opposite forces and distinguish zero net force from zero motion.
Open lesson 1Net force, acceleration, and work
Use signed quantities to connect net forces to velocity changes and energy.
Before you begin
- Add signed numbers; divide; square whole numbers; use metres, seconds, kilograms, and newtons.
Choose by skill rather than age alone. Read with an adult when useful, revisit a lesson, or explore another grade.
Follow the lesson sequence
Calculate Acceleration from Net Force
Apply a = Fnet/m with a stated horizontal model.
Open lesson 2Track Velocity through Slowing and Reversal
Use v = v0 + at when acceleration is constant.
Open lesson 3Check Net Work against Kinetic Energy
Use a simple one-dimensional work-energy model.
Open lesson 4Review and transfer
After the lessons, try 4 new review cases and a practical task. Each answer has an explanation and a link back to the related lesson.
Open the unit reviewGuest answers are temporary. Keep your own paper or document; this unit does not certify completion or record a school grade.