По олимпиадам / USAPhO

USAPhO 2015

F = ma

PDF организаторовВсе заданияВсе решения
1Crossing time for a boat in a flowing river *
2Average speed over a two-segment car trip *
3New airplane speed after doubling engine power *
4Acceleration versus applied force with static friction *
5Miss distance of a projectile hitting a cliff *
6Center of mass speed after cart collisions *
7Final speed of a cart chain in inelastic collisions *
8Final speed of a cart chain in elastic collisions *
9Final speed of a ball after an oblique collision *
10Kinetic energy change in an oblique collision *
11Fraction of a sphere submerged in oil *
12True statement about a pendulum's acceleration *
13Direction of acceleration for a swinging pendulum *
14Tension in a rope on a spinning rod *
15Work done pulling masses toward a spinning rod's center *
16True statements from a potential energy graph *
17Maximum energy stored in a spinning flywheel *
18Functional relationship from a log-log plot *
19Oscillation frequency of a U-tube manometer *
20Height difference in an oil-water manometer *
21Total bounce time of a ball with restitution *
22Kinetic energy at the bottom of inclines with friction *
23Maximum spring displacement after a falling collision *
24Frequency ratio of two tensioned strings *
25Frequency ratio of coupled cart oscillations *

USAPhO

PDF организаторовВсе заданияВсе решения
1Problem A1
2Problem A2
3Problem A3
4Problem A4
5Problem B1
6Problem B2