Chapter 5
Projectile Motion
Choose a direction convention and force model, then use the same elapsed time for horizontal and vertical motion.
Spaced review
Remember this chapter
Save this chapter's 4 recall cards. We'll bring each one back just before you're likely to forget it, a few minutes a day.
Free account needed, so your cards follow you to any device. Notes and quick recall stay free without one.
Choose a lesson
Weight and gravitational energy change
Distinguish mass, weight and support force, and derive the energy change from a vertical height difference.
Perpendicular components, one elapsed time
Use the ideal projectile model for a horizontal launch and explain its comparison with a matched vertical drop.
Launch and land at different heights
Choose the future landing root, combine velocity components and check the landing speed using energy.
Falling with air resistance
Explain the changing force balance, terminal speed and continuing transfer from gravitational energy.