posted by Bet .
Whenever you use a inclined plane a. deis ezual to dr b. dris zero, c. deis less than dr, d. de is greater than dr
Please type your subject in the School Subject box. Any other words, including obscure abbreviations, are likely to delay responses from a teacher who knows that subject well.
And you probably will need to proofread and clarify what you posted. It doesn't make a whole lot of sense.