| Step | Action | |------|--------| | 1 | Start with or F=ma past exams – build speed and accuracy. | | 2 | Move to Irodov selected problems (e.g., dynamics of rigid bodies). | | 3 | Study Morin’s book excerpts for unconventional mechanical reasoning. | | 4 | Attempt IPhO official mechanics problems (years 2015–present). | | 5 | Simulate contest: solve USAPhO semifinal problems under time limit, then check against official solutions. |
dr=−udt+vcosθdt=−ds+vucosθds=−(1−vucosθ)dsd r equals negative u space d t plus v cosine theta space d t equals negative d s plus v over u end-fraction cosine theta space d s equals negative open paren 1 minus v over u end-fraction cosine theta close paren d s | Step | Action | |------|--------| | 1
Use the bounce rule for elastic hits. The separation speed equals the approach speed. v=v2−v1v equals v sub 2 minus v sub 1 Add the equations: Add step 1 and step 2 together. | | 4 | Attempt IPhO official mechanics
Make sure your final answer has the right units (like meters per second). The separation speed equals the approach speed
A collection of problems covering kinematics, dynamics, energy, and angular momentum.