Работа A

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1Net force on a coin approaching terminal velocity *

2Comparing kinetic energy in elastic versus inelastic collisions *

3Maximum height off a moving curved wedge *

4Oscillation period from a suddenly released spring *

5Minimum force to roll a cylinder over a step *

6Bouncing ball's timing and spacing down an incline *

7Rod tension when a swinging mass is horizontal *

8Trajectory type from a given orbital speed *

9Ground speed of a point on a rolling wheel *

10Moment of inertia of a half annulus *

11Uncertainty in a car's measured speed *

12Time between bounces of a decaying steel ball *

13Power scaling for juggling more balls *

14Coriolis deflection of a fired bullet *

15Horizontal velocity of a tumbling launched rod *

16Depth error from ignoring sound travel time *

17Minimum force to hold a disc in a spring launcher *

18Exit speed of a wedge from a torque launcher *

19Angular frequency of a submerged pendulum *

20Stability condition for a spring-supported rod *

21Comparing orbits inside and at the edge of a dust cloud *

22Tension ratio in a two-string conical pendulum *

23Spin direction of a sphere pushed on a sliding slab *

24Period ratio in an anisotropic 2D potential *

25Water jet speed from a hole in a turning car's beaker *

Работа B

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26Friction energy lost sliding down then along level ground *

27Comparing densities of wood and styrofoam by floating *

28Potential energy ratio of two springs in series *

29Collision time for two mutually attracting masses *

30Gravitational acceleration profile inside a layered Earth *

31Density profile of a self-gravitating spinning cylinder *

32Wire tension change when a boat floats in a trough *

33Scale reading while pressing with both hands *

34Force holding a ball between a wall and a board *

35Cart speed after a ball settles in its bowl *

36Moment of inertia of a square with a circle removed *

37Comparing energy and angular momentum of two orbits *

38Wetted region on a wall from a faster water jet *

39Initial speed for a ball to bounce back to its start *

40Estimating air resistance on a swung mass *

41Return time of a spinning, sliding hoop *

42Comparing return times of a hoop and a disk *

43Dominant uncertainty source in a race time estimate *

44Acceleration graph of a wide-swinging physical pendulum *

45Descent time compared to ascent time on a frictional ramp *

46Normal force on a freight car filling with grain *

47Minimum pressure to bruise a dropped apple *

48Maximum track amplitude for a comfortable train ride *

49Acceleration of a rope end pulled over a pulley *

50Best measurement choice to minimize uncertainty in g *

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1A1. Collision Course

2A2. Green Revolution

3A3. Electric Slide

4B1. Strain in the Membrane

5B2. Stellar Black Box

6B3. Pitfall