To determine which pair has the same dimensions, we analyze the dimensional formulae of the given quantities:

1. Work ($W$): Defined as the product of force and displacement ($W = \mathbf{F} \cdot \mathbf{d}$). Its dimensional formula is $[ML^2T^{-2}]$ .
2. Energy ($E$): Energy is the capacity to do work. Kinetic energy ($K = \frac{1}{2}mv^2$) and potential energy have the same dimensions as work, which is $[ML^2T^{-2}]$ .
3. Power ($P$): Defined as the rate of doing work ($P = W/t$). Its dimensions are $[ML^2T^{-3}]$ .
4. Momentum ($p$): Defined as the product of mass and velocity ($p = mv$). Its dimensions are $[MLT^{-1}]$ .
5. Force ($F$): Defined as mass times acceleration ($F = ma$). Its dimensions are $[MLT^{-2}]$ .

Conclusion: Comparing the dimensions, Work and Energy both possess the dimensional formula $[ML^2T^{-2}]$.