2
$\begingroup$

When I do

rotation =Quantity[50.7, (("Radians")/("Seconds"))]
Torque = Quantity[15369, "Meters" "Newtons"]
PuissanceMoteur = Torque rotation
UnitConvert[PuissanceMoteur, "Watts"]

I get the error: Quantity::compat: (Meters Newtons Revolutions)/(Seconds) and Watts are incompatible units

Any explanation ?

Rgrds,

==========

Updating a little bit on another inconsistency:

When I do 

UnitConvert[rotation, "revolutions"]*rayons[[4]] 2 \[Pi] Quantity[1, "Millimeters"]/Quantity[1, "Revolutions"]

I get: 

Quantity[33943.5, ("Millimeters" "Revolutions")/("Seconds")]

However if I declare:

revs = Quantity[1, "Revolutions"]

and then do:

UnitConvert[rotation, "revolutions"]*rayons[[4]] 2 \[Pi] Quantity[1, "Millimeters"]/revs

I get:

Quantity[1, "Revolutions"]

Quantity[33943.5, ("Millimeters")/("Seconds")]

This is wrong as I do exactly the same thing here ?

Improve this question
$\endgroup$
1
  • $\begingroup$ Just found another inconsistency: $\endgroup$
    – Maarten Mostert
    Apr 20, 2018 at 7:07

1 Answer 1

Reset to default
2
$\begingroup$

Apparently "Radians" is not interpreted as dimensionless by default:

UnitConvert[PuissanceMoteur, "Watts*Radians"]

779208.rad W

Improve this answer
$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

Not the answer you're looking for? Browse other questions tagged or ask your own question.