* echo
Results
The results of your exam are displayed below.
Depending on what you've set the SHOW level to be
you'll see various amounts of grading information. For example,
SHOW=4 displays the correct answer for questions you
have incorrectly answered and adds one line of hints. Higher values of
SHOW will confusingly include correct answers to both forms of the
question.
*let sshow=show
*set show 2
This was a timed test you spent
*let timet=secnds-time0
*if (timet.lt.0) then
*let timet=timet+24*3600
*endif
*write timet/60 f5.1
minutes on it.
*let show=sshow
* noecho
1 b a
Work = F·s and Work-Energy Theorem
2 a d
Use conservation of energy! PE = mgh; KE = ½ mv2.
3 d c
Inelastic collisions just conserve momentum; elastic collisions conserve both KE and momentum.
4 c a
Pendulum period depends mostly on L and g; for "small" swings it is independent of amplitude.
5 d a
* echo
Summary Results
Out of the five
questions, you answered
* let ntry=5-(nblank+n_blank-5)
* write ntry i3
questions and got
* write nright+n_right i3
correct --
* if (ntry.gt.0) then
that's
* write nint((nright+n_right)/ntry*100) i3
percent correct overall.
* else
if you want to get some correct, you
really should try to answer some!
* endif
On the real exam, you should be sure to guess an answer
for each question. However, on this web exam I give you the
expected ¼ of a correct answer per blank answer.
Thus if you have no idea what the correct answer is
leaving the web answer form blank does no harm on average.
Your expected score (including blanks) is:
* let score=nright+n_right+(nblank+n_blank-5)*.25
* write score f5.1
* log score '6Hscore=,f5.1'
*show