F = ma

PDF организаторовВсе заданияВсе решения

1When a parametric path crosses the x-axis *

2Acceleration from a velocity-time graph *

3Average velocity from a position function *

4Falling distance in the second second *

5Friction pulling a crate up a hill *

6Displacement from a quadratic velocity *

7Energy cost of speeding up a toy car *

8Scaling of gravitational potential energy *

9Center of mass of a sliding block and wedge *

10Matching angular accelerations of two wheels *

11Ranking kinetic energies of spinning shapes *

12Balancing a rock on a measuring stick *

13Momentum graphs of an elastic collision *

14Friction direction on an accelerating car *

15Tension in a string unwinding a disk *

16Baseball bouncing off a basketball *

17Tangential and normal acceleration of a projectile *

18Friction coefficient of an ice chute *

19Extension of a non-Hookean spring *

20Wall collisions and energy loss *

21Scaling of a sphere's rotational inertia *

22Momentum gained by rockets of different mass *

23Apparent weight on a spinning planet *

24Launch angle against a constant wind *

25Oscillation period of a floating box *

26Friction coefficient of a sliding sled *

27Artificial gravity after astronauts move inward *

28Maximum friction before a braking bike tips *

29Maximum deceleration before a braking bike tips *

30Braking bike with unequal front and rear friction *

31Radius of gyration of a uniform rod *

32Oscillation frequency of a swinging rod *

33Maximum oscillation frequency of a swinging rod *

34Angular momentum of a string winding around a post *

35Speed of an object winding on a tether *

36Length of rope wound around a post *

37Elastic collision breaking a tethered cord *

38Kinetic energy after an elastic tethered collision *

USAPhO

PDF организаторовВсе заданияВсе решения

1Problem A1

2Problem A2

3Problem A3

4Problem A4

5Problem B1

6Problem B2