PLAY NOW · 17
River Crossing: Beat the Current
Steer a boat across a flowing river. Discover why aiming straight across lands you downstream, and find the heading that cancels the current.
- Ground velocity
- v = v_b + v_w
- Straight across
- s · sin θ = u
Topic · 3 games
A vector has a size and a direction. These games show when quantities add like numbers and when they add tip to tail.
PLAY NOW · 17
Steer a boat across a flowing river. Discover why aiming straight across lands you downstream, and find the heading that cancels the current.
PLAY NOW · 18
Follow a compass route leg by leg. Watch the distance walked keep growing while the displacement can shrink back to zero, then predict the shortcut.
PLAY NOW · 19
Balance a ring pulled by strings at different angles. Discover why 3 N and 4 N need exactly 5 N to cancel, and why only the vector sum matters.
11 games
Position, velocity, acceleration, and gravity.
2 games
Units, SI prefixes, and scientific notation.
3 games
Rearranging formulas: inverse operations and unit checks.
3 games
Right triangles, inverse functions, and the unit circle.
3 games
Horizontal and angled launches: two motions at once.
3 games
Uniform circular motion, angular velocity, and centripetal force.
3 games
Newton's law of universal gravitation, weight, orbits, and Kepler's laws.
3 games
Force equilibrium, cable tension, torque, and support reactions.
5 games
Torque, lever arms, tipping, and angular acceleration.
3 games
Centre of mass, balance points, composite objects, and toppling.
9 games
Density, buoyancy, floating, and pressure under water and in the air.
3 games
Flow, Bernoulli's principle, jets, pipes, and lift.
10 games
Amplitude, period, frequency, pendulums, springs, energy, and resonance.
27 games
What a wave is, amplitude, wavelength, frequency, period, and sound.
10 games
Electric charge, electrons, and the forces between charges.
16 games
Voltage, current, resistance, and the energy circuits carry.
Collection · 4 games
Forces and torques that cancel: ΣF = 0 and ΣM = 0.