Dave Plowman (News) wrote:
In article ,
Lobster wrote:

Not disagreeing of course, but from an engineering viewpoint, why is
that? I've often wondered as I reach for a longer screwdriver to shift a
stubborn screw, to which the same principle applies... From my A-level
physics many moons ago I remember that torque (Nm) = force applied (N) x
radius (m); so if the radius stays constant, how does torque increase?
Isn't it independent of shaft length according to this equation?


I *think* a longer screwdriver usually has a larger handle so you get
better purchase on it.


Or 2 hands (e.g. yankee driver)

--
Chris
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