Mechanics & Wave Motion Midterm 2

The material in Physics 16 is inherently cumulative: it is almost impossible to write an exam that does not draw on material from the beginning of the course.  Although you may need to use material from the first midterm, I will try to focus the second midterm on later topics.  In particular, the big topics for this exam are

1. More complicated Newton's laws
   1. Static and kinetic friction and coefficients of friction
   2. Ideal pulleys - fixed and free
   3. Circular motion, including banked curves
2. Work-energy theorem
   1. Potential energy, including gravity and springs

Bring a calculator.

Crib sheet

You may bring your crib sheet from the first midterm and an additional two sides of  notes prepared by you personally.

Timing

This is a self-scheduled test.  You may pick it up from me in my office (Merrill 118) any time from 10:00 AM to 5 PM on Friday, Nov. 6.  You will have two hours for the exam: return it to me at that time.

Preamble 

This is a lot of problems.  I do not expect you to complete every one of these.  I do suggest that you attempt each one.  If you are confident you can do a problem, skip it.  Otherwise, rough out a solution by writing down a system of equations and thinking through how you would solve them.  Check against the posted solution to see if your thinking is correct, but you probably don't need to do all the algebra unless your approach is different from the solution's and you're unsure whether they concur.

Questions

Energy: 6.78, 6.81, 6.83, 6.85, 6.84, 6.100, 7.44, 7.46, 7.48, 7.55,  7.65, 7.68, 7.73, 7.79 .
The book splits the work-energy theorem (Chapter 6) from potential energy (Chapter 7), so the official solutions to problems from Chapter 6 never refer to potential energy even though many of them could be done (often more easily) by using potential energy considerations.

Solutions

Midterm 2 practice problems solns

Ignore the last question that asks about collisions.

Questions	Answers