PHYS 161 Exams 

The handout at right provides guidance on grading yourself after you finish your test. 


Partial List of Topics Covered Anything in the book or lectures/labs is also fair game 
Test 
Solution 
Comment 
Chapters 14 1D, 2D & 3D motion · Standard projectiles (a_{x}=0) · Projectiles with nonzero a_{x} · Tricky word problems requiring derivatives or integrals. Remember: sometimes plugging in zero for a limit gives nonzero result! 1D motion graphs · Use problem statement to create a graph · Interpret graphs · Distinctions between an xtplot versus a vtplot versus an atplot Vectors · Ordinal directions (N of W versus W of N) · Dealing with angles to the vertical versus angles to the horizontal · Addition (graphical or with SOH CAH TOA) · Cross & dot products · Creating unit vectors · Angle between two vectors · Angle between vector and an axis Sig figs & math with sig figs Prefixes & Notations · Scientific versus engineering · Be able to go from power of 10 to prefix · Be able to go from prefix to power of 10 · WATCH OUT! Use either prefix or power of 10 BUT NOT BOTH!!! Relative motion 
















NA 
Solutions to each question at end of same file. 

Chapters 58 Excel or other computation Newton’s Laws · Frictionless force problems (often multiblock) · Friction force problems (often multiblock) · Circular motion force problems · Tricky concept questions Workenergy theorem (Ch 7 methods) Work done by nonconstant force using integral Determine force from potential energy Determine potential energy from force · Remember: sometimes plugging in zero for a limit gives nonzero result! Energy problems (Ch 8 methods) Know these tricks: · Determining height of circular arc · Determine height on incline · For two blocks use two GPE reference levels · Use FBD to determine n & f so you can get W_{friction} · Often useful to do circular motion FBD for energy problems with circular tracks or loops · If spring is changing length in problem, we typically use energy (because spring force & acceleration are NOT constant).. Do NOT use constant acceleration kinematics if spring length is changing in problem! · If spring at fixed length for entire problem, we often can use F_{spring}=kx in an FBD · Use period, speed, &/or omega interchangeably for circular motion 














NA 
Solutions to each question at end of same file. 

Chapters 912 Momentum and Impulse · 1D elastic · 1D or 2D inelastic · Explosions Center of Mass & Moment of Inertia · If calc required, expect a 1D problem · If calc NOT req’d, could be any dimensionality, could have holes, could require parallel axis · Perpendicular axis might be extra credit Rotational Kinematics · Constant angular accel · Nonconstant angular accel · Plots · Know a, a_{c}, a_{tan} & a_{total} Relating Rotational & Translational Motion Torque & Energy Methods for: · Rolling Motion (without slipping) · Blocks with Massive Pulleys · Swinging Motion* *WATCH OUT! In most swinging motion problems you CANNOT use constant acceleration kinematics (while most rolling or blocks w/ pulley you CAN). Angular Momentum · Rotating object changes shape (e.g. neutron star, figure skater brings arms in). · Rotating object impacts rotating object (e.g. drop spinning disk on spinning turntable) · Collision in space without pivot: Usually both angular and linear momentum conserve. After collision rotates about center of mass. Often need parallel axis theorem to get moment of inertia. · Collision with pivot: Usually only angular momentum is conserved. After collision rotates about pivot. · For points masses moving in straight line use mvr_perp. · For points masses attached to something spinning use I_pointmass=mx^2. · Don’t forget: angular momentum could be + or !!! Which conservation laws apply? Static Equilibrium Stress & strain (1D Young’s modulus) 














NA 
Solutions to each question at end of same file. 

Final exam questions from Ch 13 & 14 Ch 13—Universal gravitation · Circular orbit do FBD &/or KE & GPE · Conservation of energy (Escape velocity, release four point masses from rest, etc) · Place point masses on grid. Get net force on one of the masses. Remember that you must add force VECTORS not force MAGNITUDES. · Place point masses on a grid. Get gravitational potential energy. Ch 14—Fluids & Pressure · Buoyant force · Static pressure versus depth (Utubes or force on a dam) · Ideal fluid flow problems using continuity equation &/or Bernoulli equation (e.g. siphon or hole in a can) · Sometimes throw in a 1 pointer from all the weird demos...not worth stressing over. 
Covers Chapters 510 
Available After Last Oral Exam Late Thursday Night 




