On 28/05/2017 03:38, Johnny B Good wrote:


The only fly in the ointment with this last option is WTF didn't the
daft butcher slide all the hooks to the right hand end of the bar
beforehand? That way, he could have reduced the strain and effort on his
musculoskeletal system even further by arranging for hook V to be nearer
again, allowing him to slide the 'heaviest weight' to the far end of the
bar with even less strain and effort, leaving the remaining hooks close
to hand and available for more '(but slightly less) heavy weights'.

He doesn't need to he has a hook in the meat already and would just hook
it on the rail nearest him.


I may be wrong in interpreting this question as one of 'ergonomics' but
**** it all, that's the only way to make any sense of this one.

Moving onto the cups question which seems to be a question of which of
the four cups encloses a presumed identical volume of liquid with the
least amount of surface area, I'm rather drawn to B despite answers C and
D looking like they could be equally as good a choice (the 'All equal'
option is rather spoilt by A being quite obviously the one destined to
cool the fastest).

All of them (cogs question)

N

Fall

V (looks closest to the optimal 45 degree angle ignoring air resistance)

A

H

R

V

C

All equal (assuming we ignore friction effects as Galileo was able to)

N

Fall


truss answer missing here.

If the truss has been dimensioned correctly they will all have the same
strain but they may well have different loads causing that strain.

Rise and then fall

doesn't that depend on the taps being identical?
if the flow rate is slow the fall will be impossible to see even if you
know it is there.


H

L

R

W

D (as the previous student indicated, assuming a sweeping bend rather
than a tight hairpin bend where the right answer could easily be "All
equal"). Again, yet another question where I can't decide whether I'm
facing a cunningly disguised question concerned with the dangers of
making unwarranted assumptions or just very shoddy question setting.

Its the inside one assuming they depict someone going around the same
bend as you have to lean more the faster you go around the bends which
is why motorcylists scrape their knees and then fall off.


Move in a circle

N assuming disks with holes punched in them (in which case, WTF is
causing M to remain poised in its depicted position?)

The examiners hand.

S

It depends how you define work.
S would have to push hardest but travel less distance.
In reality he wouldn't be able to shift the thing as you wouldn't have
four operating positions if you only needed one man to do the job.


X (assuming equal effort on the part of the 'pushers')

Wow! Yet another imponderable question (about skiddiest car). Yet again,
we are left to make several assumptions from the very poor quality
'evidence of our eyes' but I'll give it a go.

I'm led to assume we are looking at a **** poor sketch of a snapshot
overhead view of a sharp bend or corner on a race track and further
obliged to assume a dry equally grippy road surface with no adverse
camber or rubber crum to penalise any of the cars which I'm further
obliged to assume all have equally grippy tyres and are all travelling at
the same speed in some sort of race event.

Having been forced to make all these assumptions just to drill down to
what I *think* is the core of the problem, I can only conclude that car C
is most likely to skid due to its higher rate of change of velocity
needed to negotiate the bend on a tighter radius than the other three
cars which results in higher side forces being applied to the tyres from
the resultant centripetal force.

In real life, there are many reasons why answer C will be most
emphatically wrong but, what the hey, this is just a question on a 1950's
mechanics exam paper. :-)


Looking at it C can't be turning yet or the rear wheels will hit the curb.

B is going to have to turn sharpest or he will hit A.

I would say B because he is going to have to hit the brakes to avoid A.

H

One

All equal

The mechanism will jam (I'm only 99% sure but if I'm wrong then opposite
direction unevenly becomes the only viable alternative)

doesn't the sliding pivot stop it from jamming?



I would hope that such shoddy exam question setting as exhibited by JR
Morrisby's efforts would be rejected today. However, I believe (rightly
or wrongly) that such shoddiness in examination question standards still
abounds to this day.


Well done.
have a gold star.