F = ma

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1Distance from an average speed with a stop *

2Ranking average accelerations from velocity graphs *

3Ranking maximum velocities from velocity graphs *

4Ranking distances traveled from velocity graphs *

5Estimating Earth's orbital acceleration *

6Inelastic collision of sliding children *

7Kinetic energy change of a spinning skater *

8Visible fraction of a floating block *

9Length of a spring pulled from both ends *

10What increases a pendulum's period *

11Water level as a cup sinks *

12Compressive force in a triangle of gravitating masses *

13Critical pull angle on a rolling spool *

14Spacing weights for a uniform beat *

15Spring constant from an oscillator's speed *

16Force to hold a rope against a railing *

17Speed of a box after a rope slips *

18Rebound height on a second frictional ramp *

19Return time in a 2D restoring force field *

20Maximum distance from origin in a force field *

21Dimensional analysis of a gas pressure vessel *

22Engine RPM for maximum power *

23Why a projectile's parabola isn't an ellipse *

24Friction power in a turntable bearing *

25Matching a rolling cylinder and sliding block's descent *

USAPhO

PDF организаторовВсе заданияВсе решения

1Problem A1

2Problem A2

3Problem A3

4Problem A4

5Problem B1

6Problem B2