Cuesta College, San Luis Obispo, CA

111127-Phys205A-Midterm2-confusing

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Wordle.net tag cloud for confusing topics covered in Midterm 2, generated by responses from Physics 205A students at Cuesta College, San Luis Obispo, CA (www.wordle.net/show/wrdl/4480072/Untitled).

Students have a weekly online reading assignment (hosted by SurveyMonkey.com), where they answer questions based on reading their textbook, material covered in previous lectures, opinion questions, and/or asking (anonymous) questions or making (anonymous) comments. Full credit is given for completing the online reading assignment before next week's lecture, regardless if whether their answers are correct/incorrect. Selected results/questions/comments are addressed by the instructor at the start of the following lecture.

List at least three words describing confusing subjects covered in class (up through this midterm). (Graded for completion.)

[Responses have been edited to consolidate related common subjects.]

Student responses

Sections 70854, 70855

leverarms, buoyancy, torque

flow, inertia, gravity, flow

fluids, SHM, waves

strings waves density

physics physics physics

torque, buoyancy, flow, leverarms, rotations

buoyancy, fluids, pressure

leverarms

formulas, collisions, inertia

energy density conservation, SHM, rotations, energy

everything

everything

studyguides flashcardquestions

buoyancy, momentum, leverarms

collisions, formulas

buoyancy, buoyancy, buoyancy

torque leverarms

fluids, waves, buoyancy

fluids, buoyancy, energy conservation

buoyancy, torque, energy conservation

difficult, unrelenting, complex

Zerg torque conservation

buoyancy impulse pendulum

impulse momentum, collisions, density

buoyancy, torque, flow

work, energy conservation, torque

everything, everything, ahhh :(

pressure, fluid flow, pressure

friction friction friction

energy, buoyancy, momentum

collisions

impulse momentum, buoyancy

buoyancy stress strain

statics, momentum, stress strain

density, buoyancy, Zerg

forces, leverarms, torque

leverarms, torque, friction collisions

stress strain energy rotations inertia

difficult confusing hard

rotations, expansion, pressure

standingwaves, momentum, conservation, fluids, flow

pressure, buoyancy, friction

waves frequency

Describe your most confusing subject, and briefly explain why this subject confused you. (Graded for completion.)

The following are all of the student responses to this question, verbatim and unedited.

"Torque because it doesn't make sense to me."

"inertia, confusing"

"Fluids. It was a very broad chapter and I didn't master any part of it very well. The equations and math confuse me."

"waves, its a very odd concept for me to grasp"

"word problems"

"torque. too many weird values and parts- what the heck is a lever arm? what is an r perp? why does the T for torque look like it is sitting down?"

"Buoyancy was difficult to understand probably because I missed the lectures."

"Drawing lever arms, and knowing which lines are which."

"Trying to remember how to apply all of the different formulas is difficult for me."

"Torque because I'm still confused on determining forces and magnitude acting on the objects."

"torques"

"physics is confusion"

"Uelas and Krot"

"wave nature because i have no time the past two weeks:("

"Momentum is the most confusing subject to me on this upcoming midterm because the questions regarding momentum always are the hardest to decipher."

"I understand most of it, but it takes to long to solve a problem in a timed test setting so I need to practice more."

"Lever arms are still very confusing for me because I always seem to miss one step."

"For whatever reason I've always had more trouble with static fluids than dynamic fluids. But both subjects can be confusing at times."

"fluid, don't even know how to start it, and for other problems just sometimes don't know what is 0 and know what cancel out"

"Buoyancy and Perfectly Inelastic collisions. Instead of going over the basic concepts with flashcard questions for most of the time in class, I believe that we should do more problems in class because when we do problems we learn the basic concepts as well."

"Standing waves are most confusing because i'm having trouble comprehending resonant frequencies."

"The problems that are more complicated (like 7.43) usually mess my up. anything beyond a 'plug and chug' usually takes allot of practice for me to make sure I dont get hung up on anything. As for the zerg, they're just jerks."

"I guess i was having trouble with drawing the force diagrams accurately for these problems"

"collisions and energy conservation was the most confusing."

"buoyancy, i didnt learn it ever"

"While I feel like I understand the concept of torque, sometimes I have trouble finding r perp correctly especially when you have angles that require you to use sin, cos, tan to complete the problem."

"lever arms."

"Pressure, I just didn't get enough explanation of the equations"

"Fluid Physics - I don't know; that whole 'buoyancy' thing still irks me."

"bouyant forces, it is confusing because i haven't spent the necessary time to cover the material like i would like to."

"The problem we went over in class 7.44, WHAT THE HELLLLLLLL (P)"

"lever arms, i cant ever draw the line of motion"

"Nothing!"

"motionless, things without motion does not make sense"

"Energy conservation, mostly because we did not use it as much."

"Torques, I get really frustrated with the right hand rule."

"friction with perfectly elastic situations."

"Kinetic rotational inertia was difficult because my algebra is weak and i have trouble moving around mathematical symbols on either side of the equation such."

"Waves because there are a lot variables"

"my main problem is all circluar motion and rotational stuff because I have a hard time calculating it"

"I still can't grasp my mind around how a object/material will resonate at a certain frequency."

"bouyancy is kind of difficult to understand at first but when it is understood it is more interesting than hard"

"The most confusing part is remembering what all the variables are used for what and what their SI units are."

## 1 comment:

Physics 205A Midterm 2 Survey, fall semester 2011

Cuesta College, San Luis Obispo, CA

Student responses (raw, unedited, unconsolidated)

Sections 70854, 70855

Lever arms, buoyant forces, torque

flow rate, inertia, gravitational flow

Fluids, SHM, Graphing waves

strings waves density

physics physics physics

torque, hydrostatic weighing, volume flow conservation, lever arms, rperp, rotational dynamics

Buoyancy, Fluids, Pressure

the lever arms.

Formulas, Collisions, Inertia.

energy density conservation, simple harmonic motion, rotational kinetic energy

every subject

everything

the way it is all taught all over the place, we need more study guides and answers to flash cards

bouyancy, momentum, levers

bouyancy, momentum, levers

Perfectly inelastic, inelastic, formulas

Buoyancy, Buoyancy, Buoyancy

Torque and lever arms

Fluids, Wave motion, and buoyancy.

fluid, boyance, energy conservation

Buoyancy, Torque, Energy Conservation of all kinds

Difficult, unrelenting, complex.

Zerg torque conservation

buoyant impulse pendulum

impulse momentum theorem, collisions, density

buoyancy, torque, volume flow rate

work, energy conservation, torque.

everything, everything, ahhh.:(

Pressure, Bernoulli, absolute vs. gauge pressure

friction friction friction

kinetic energy, bouyant forces, momentum

PERFECTLY INELASTIC COLLISION

impulse momentum, bouyant forces,

hydrostatic electricity

motionless, momentum, elastically

Density, buoyancy, Zerg

Forces, lever arms, torques.

lever armss, torque, and friction with elastic situations.

Tensile Strength Kinetic Rotation and Inertia

Difficult confusing hard

Everything with circes, heat expansion, and pressure

Fundamental frequency, Momentum concervation, Ideal fluid flow.

pressure, bouyancy, friction

Sounds waves and Frequencies

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