Exam prep · Free college course
A complete first-semester algebra-based physics course, built from OpenStax College Physics 2e chapters 1 through 17 and the C-ID PHYS 105 transfer descriptor, with AP Physics 1 as a cross-check. It starts with units, vectors and one- and two-dimensional kinematics, then Newton's laws, friction and circular motion, followed by work and energy, momentum and collisions, torque and rotation. The second half covers fluids at rest and in motion, temperature and the ideal gas, heat transfer, thermodynamics, and oscillations, waves and sound. No calculus is needed. Every chapter opens with a notes card holding its equations, and about a quarter of the cards are worked calculations (projectiles, forces on inclines, energy conservation, collisions, Bernoulli, calorimetry, Carnot efficiency, Doppler shifts), each independently recomputed before publishing, with g = 9.80 m/s^2 throughout.
Copied straight from the course. In the app, each wrong option also gets its own explanation.
Card 1When a car accelerates forward on a road, which external force actually pushes the car forward?
The road pushing forward on the tires. The tires push backward on the road, and by the third law the road pushes forward on the tires; that external force accelerates the car.
Card 2Neglecting air resistance, a 5.0 kg rock and a 0.50 kg rock are dropped together from the same height. What happens?
They land at the same time. Without air resistance both rocks accelerate at g = 9.80 m/s^2, so from the same height they reach the ground together.
Card 3Air (density 1.29 kg/m^3) flows over the top of a wing at 65.0 m/s and under it at 55.0 m/s. What is the pressure difference between the bottom and top surfaces? Round to 3 significant figures.
774 Pa. delta-P = (1/2) rho (v_top^2 - v_bottom^2) = 0.5 x 1.29 x (4225 - 3025) = 774 Pa.
Yes. Create a free Encodr account and all 16 units and 1,013 cards are yours to study, with spaced repetition scheduling your reviews.
Algebra-based, the sequence most biology, chemistry, pre-health and other non-engineering majors take. It uses algebra and right-triangle trigonometry, never calculus.
OpenStax College Physics 2e chapters 1 through 17: measurement and vectors, kinematics, Newton's laws, friction and elasticity, circular motion and gravitation, work and energy, momentum, statics and torque, rotational motion, fluid statics and dynamics, temperature and gases, heat transfer, thermodynamics, and oscillations, waves and sound.
About a quarter of the cards are worked calculations. Every numeric card gives its values and constants in the prompt, states its rounding rule, and was independently recomputed before publishing. The rest are concept cards aimed at the classic misconceptions.
No. Every problem is described fully in words, and each chapter opens with a notes card holding the equations and definitions its cards rely on.