On 26/05/2017 13:40, Robin wrote:
On 26/05/2017 12:35, Clive George wrote:
On 26/05/2017 08:55, Robin wrote:
There were more than one question however where there seemed to be
insufficient information.

The car skid for example.

Also the capstan.

The one with the weight hanging off rope at the top of the well? There's
enough information there.

I had in mind the nautical capstan with 4 men and "Which man would have
to work hardest to turn the capstan alone?" ISTM "hardest" is ambiguous
between (a) the force exerted (highest for shortest lever), (b) the
energy required per unit time (ditto if they walk at the same speed -
linear not angular - when walking alone), and (c) the energy required
per revolution (same for all).

Ah, right, fair enough.