The Palladian-A step beyond

Fleib and Richard,
If we agree that the movement is the same at the stylus for both high and low compliance cartridges......wouldn't the greater movement at the end of a high-compliance cantilever cause an equally larger reaction (Newton) which the tonearm sees?
Wouldn't that then put greater stress into the arm?
No-one can explain by physics.....why it is claimed that low-compliance cartridges put greater stress into tonearms....🤔

Halcro

Low compliance carts are stiffer, so it takes more effort to deflect  the suspension when playing a record.
More energy in that has to be controlled by the arm.
 

Cheers 

Low compliance carts are stiffer, so it takes more effort to deflect the suspension when playing a record.

Hang on......
We've agreed that the deflection of the stylus at the groove is the same for high and low-compliance cartridges.
Which means that the end of the cantilever must move more with high-compliance and less with low-compliance.
Where does "effort" come into play in a physical sense?
I don't understand the term "effort" in a structural sense either?
Can you put it in an equation?

Halcro
It's late, a long day and I have an early flight to your country. I assume that it is hot?

Compliance  measured in um/mN
I think I have the units right? Please excuse me if I haven't.

Anyway.... 
So for a given force we have a measured deflection.
It takes more force (effort) to move a low compliance cartridge a given distance.

So when playing a record, a low compliance cart will need a higher force applied to the stylus to make it move. We want the cart body to stay still while this is happening so it must absorb this energy. Which in turn means the arm has to deal with this as well.

When playing a record, a high compliance doesn't necessarily mean more movement at the motor end of the stylus. The opposite is also not necessarily true. 
It depends upon the geometry of the suspension and where the mag or coils are.
This with all the usual caveats of compatible arm, etc

cheers 

Thanks Richard,
I think that makes sense....🤓