Final answer:
The dimensions of the derivative dx/dt = 3at² b are L/T or length per unit time.
Step-by-step explanation:
The dimensions of the derivative dx/dt = 3at² b can be determined by analyzing the dimensions of each term in the equation.
- The dimension of dx/dt is L/T, which represents length per unit time.
- Since the equation is dimensionally consistent, all terms on the right side of the equation must have the same dimension.
- The dimension of 3at² is L (length) and the dimension of b is also L (length).
Therefore, the dimensions of the derivative dx/dt = 3at² b are L/T or length per unit time.