Sentence 1 (a question in fact):
Who is the speaker to whom speaking what is situation.
This is written my Literature and Composition teacher. The answer is "dramatic situation". But confusingly the question start with "who".
Here is a sentence with similar structure.
David had a stick with which to scare his cat.
Using the same structure to interpret the sentence by my teacher, it sounds like the speaker is speaking "what is situation" to himself or herself.
Sentence 2 (from my physics textbook):
We wish to locate the point of application of the single force F, where the effect on the rotation of the object is the same as that of the individual particles
The "same as" comparison is confusing. The grammar here makes the sentence sounds like at that particular location, the effect (of unknown source) on the rotation of the entire object is the same as the effect (presumably from the same source) on the rotation of the particles (comprising the object).