Работа A
1Initial speed of a ball that bounces and loses energy *
2Fastest point on a ball rolling in a right-angle chute *
3Scaling of an axe's burial depth with kinetic energy *
4Joint force in a spinning square of rods *
5Best shaking frequency for a horizontally shaken pendulum *
6New orbit radius after a star loses mass *
7Which thrown objects return to the space station *
8Acceleration-position graph from a velocity-position graph *
9Tension at the end of a pulley string system *
10Height a block is raised in a pulley system *
11Maximum mass hung from a steel rod by tensile strength *
12Locating a mass in a rod from two pivot periods *
13Angular momentum after a ballerina releases a pen *
14Acceleration graph for stacked blocks with static and kinetic friction *
15Gauge pressure beneath two liquid layers *
16Scaling of jump height from coalescing droplets *
17Scale reading while rain accumulates on a hat *
18Kinetic energy after a rotating rod's off-center collision *
19Speed of a plate atop rolling cylinders *
20Average power dissipated driving against fluctuating wind *
21Minimum force to tip a many-legged table *
22Frame dependence of momentum and energy change in a collision *
23Scaling of spring constant uncertainty with applied force *
24Vertical offset of a mass swinging on a zero-length spring *
25Stability of a ball held by two horizontal springs *
Работа B
26Cycle time for a ball bouncing between floor and ceiling *
27Moment of inertia of a square plate about its diagonal *
28Angular frequency of a conical pendulum *
29Identifying the free-fall segment of a zero-g flight *
30Closest approach of a dust mote falling toward the sun *
31Safe loading region on a three-legged table *
32Matching orbital periods after two thruster burns *
33Time for a block to stop slipping on a conveyor belt *
34Equilibrium length of a spring-string over a pulley *
35Oscillation period of two masses linked by a spring *
36Work done by a person walking down an escalator *
37Stress distribution in a cantilevered platform *
38Period of a disk oscillating about an edge pivot *
39Stopping distance of a block colliding with smaller blocks *
40Effect of closing a valve on a piston's height *
41Drop height for two masses to collide at equilibrium *
42Spring compression for a mass to rebound to its start *
43Tension ratio in a spring-linked extendable arm *
44Energy and angular velocity of a reshaping spinning object *
45Scale reading with a floating balloon inside a box *
46Correct relation for standing up on a moving swing *
47Relative sliding distance of a mass on a frictional block *
48Matching drag force by scaling a fish's swim speed *
49Maximum speed of the last box in elastic collisions *
50Observation time needed for 1% decay rate precision *
1A1. Braking up
2A2. Swoosh!
3A3. Spin Cycle
4B1. String Cheese
5B2. Mirror Mirror on the Wall
6B3. Real Expansion