F = ma

PDF организаторовВсе заданияВсе решения

1Time for train cars to pass a fixed point *

2Throw speed for a ball to bounce off a wall *

3Time of flight statements for a fixed range throw *

4Maximum angle before a two-legged sign collapses *

5Maximum downward velocity from a scale reading *

6Building height from an elevator's scale reading *

7Comparing kinetic energies at equal momentum *

8Kinetic energy of a braking truck *

9Momentum of a braking truck *

10Telling a solid ball from a hollow sphere *

11Normal force from cubes sliding off a wedge *

12Rolling acceleration of a fluid-filled shell *

13Is Saturn's ring part of the planet or its moons *

14Center of mass velocity before an elastic collision *

15Portion of a floating rod above water *

16Collapse time of a self-gravitating cloud *

17Tension in a rod orbiting a planet *

18Identifying a valid final state after internal forces *

19Angle of maximum tension in a swinging pendulum *

20Maximum tension in a swinging pendulum *

21Period scaling with a pendulum's length *

22Tension in the Achilles tendon while standing on toe *

23Spring constant of a bungee cord *

24Maximum extension of a bungee cord *

25Horizontal force to push a box up an incline *

USAPhO

PDF организаторовВсе заданияВсе решения

1Problem A1

2Problem A2

3Problem A3

4Problem A4

5Problem B1

6Problem B2