Correct! All transcendental functions (sin, cos,
ln, etc.) must be pure numbers, so in this problem sin bt can
now be ignored
[E] =[al sin bt] = [al] = [a][l]
[a] = [E]/[l] = [Fl]/[l] = [F] = MLT-2
The units of a are newtons (N).
If you have difficulty with units and dimensions you are STRONGLY urged to use the tutorial Dimensional Analysis.
Return to Self Test