1011 past contests
Topic 38 · Riddle: resultant, a single force equivalent to a system of forces
Topic 10 · Riddle: an ideal gas, whose constituents are delocalized in a volume much larger than themselves
Topic 3 · Riddle: energy — a conserved scalar quantity with dimensions $ML^2T^{-2}$ and the ability to do work
Topic 52 · True or false: rate of change of displacement equals velocity
Topic 1 · True or false: rate of change of speed (acceleration), and speed as path length over time
Topic 62 · True or false: radio waves travel faster than audible sound waves in air
Topic 62 · True or false: radio wave frequency is greater than audible sound wave frequency
Topic 62 · True or false: radio waves have longer wavelengths than audible sound waves
Topic 11 · Moment of inertia from angular momentum and angular speed, $I = \dfrac{L}{\omega}$
Topic 45 · Focal length of a concave mirror from image and object distances
Topic 14 · Volume expansivity from linear expansivity, via the factor of 3
Topic 60 · Equivalent resistance of three parallel resistors
Topic 34 · Linear momentum from mass and kinetic energy, p=√(2mke)
Topic 10 · Riddle: boiling point, the phase-change temperature famously 100 for water
Topic 5 · True or false: electric force on a charge in a uniform field is independent of the particle's direction of motion
Topic 5 · True or false: electric force on a charge in a uniform field is always in the same direction as its velocity
Topic 5 · True or false: electric force on a charge in a uniform field is independent of the particle's speed
Topic 52 · True or false: the gradient of a displacement-time graph gives velocity
Topic 1 · True or false: the gradient of a velocity-time graph gives velocity
Topic 14 · True or false: the spring with the smaller constant carries the greatest tension in parallel