The $F=ma$ competition was February 18th, 2021

The $$F=ma$$ competition is the largest physics competition in the United States, and took place online the afternoon after this Meta question first appeared. It is a multiple choice exam with tricky mechanics problems.

In the past, Math.SE has had problems with cheating on similar competitions. Please be on the lookout and do not blindly answer mechanics questions, especially if they are clearly screenshotted from an online exam. Many $$F=ma$$ questions are conceptual in nature and thus would not be closed under the homework policy, but they should not be answered until at least $$2$$ hours after posted, when the exam has ended.

• I've edited the title so that it makes sense while it still appears on the "hot meta questions" sidebar on the main site. However, regardless of whether there's a well-known physics competition running somewhere, it's always a good idea to resist the impulse to rapid-fire an answer to a low-hanging homework-like question, for the kinds of reasons suggested by this question. Food gets better if you let it marinate; so do ideas.
– rob Mod
Feb 21, 2021 at 21:19