Answer the following questions about the dimensional uniformity of physical equations.
PHYSICS · Multi-part · A Level · Physics · Measurements and their errors · Measurements and their errors
Problem
Answer the following questions about the dimensional uniformity of physical equations.
(a) State the principle which governs the dimensional uniformity of a physical equation.
(b) Power P is related to force F and velocity v by two alternative expressions written by two students:
(I) P=Fv(II) P=vF
Using appropriate reasoning based on dimensions, explain which of the above expressions could be physically meaningful.