F = ma

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1Height of a falling drop between drips *

2Minimum launch angle for height to exceed range *

3Angle at which a triangle topples on an incline *

4Speed of the third fragment in an explosion *

5Kinetic energy lost in a head-on collision *

6Time for two vertical cannonballs to collide *

7Where two vertical cannonballs collide *

8Spring compression of a sliding block with friction *

9Escape velocity from surface gravity and radius *

10Ranking rolling times down an incline *

11Forces on a box pulled by a pulley rope *

12String tensions as a hoop rotates *

13Maximum speed from a force-position graph *

14Force to hold a drilled cylinder at rest *

15Maximum constant speed of a constant-power car *

16Vibration frequency of a spring block in an accelerating cart *

17Period-amplitude relation from a log-log plot *

18What stays the same when a spring-mass box falls *

19Pipe radius pumping water with a motor *

20Scale readings for a partly submerged block *

21Height change of a stacked spring system *

22Units of sound intensity in SI base units *

23Methods that cannot measure local gravity *

24Spring constant of a rotating triangle of masses *

25Ranking speeds in circular and elliptical orbits *

USAPhO

PDF организаторовВсе заданияВсе решения

1Problem A1

2Problem A2

3Problem A3

4Problem A4

5Problem B1

6Problem B2