At this point, use Mikemac’s strategy, and if that fails, your best option is a gap year.
Email App State to let them Know your parents were so excited about the award that they responded immediately on your behalf, but that, as for you, you’re still considering your options and are thinking about a gap year to work and test out the professional fields that seem interesting to you for now. Ask if your award would still be held if you deferred for a year and worked.
Is it possible to go from physics into engineering? Yes, if you follow a specific path, like unc-w’s 2+2 program with ncsu - although why you’d do that when you would get in straight for high school and doing that Old mean forfeiting any chance at merit from ncsu, is a mystery. You could have applied to unc-w I’d that’s what they had wanted, since it’s similar in selectivity to app state. However you built your list thinking you could attend college based on your parents’ reassurance they could pay, and now that ship has sailed. Such a program doesn’t exist at App State and anyway you’d end up paying more since you’d be full pay at ncsu for 2 years.
(As a transfer, you aren’t eligible for the big scholarships).
Is it possible? Yes, but it’s indirect.
Fact of the matter is, physics is not engineering and the jobs aren’t the same.
If talking with your father’s friend doesn’t lead to them realizing a compromise (ncsu?) is possible, then you should take a gap year, making sure you take the sat this may before graduation (the score, taken Hike in high school, Will be considered, whereas if taken after graduation, it won’t.) if you got 2140 you may be able to get a bit more even with the new Sat (1450?) then apply in September for the Park scholarship. And, why not, Duke Robertson and all the competitive awards.