While i don't think you are in a need of them now but i will write it for the people who come on this thread for the same question.
Just search Youtube Lectures by Walter lewin.
As you might know Walter lewin was a prof. at MIT and is a renowned physicist and widely regarded as the most amazing...
Ohh sorry i was in a hurry XD. But why are we considering optional hardware. I mean you possibly make a whole robot just by continuing to add more and more hardware to a phone and fixing the phone a little?
100. Gyroscope
You can use your phone to align yourself according to the gravity if you are drunk like hell XD.
101. Worlds biggest shop or you can say a market.
With apps like amazon who needs a regular shop anymore.
102. Academic Conference.
You can meet worlds leading academics like terrence...
One question ..
If we throw a ball directly upwards with a speed v which is very small and the height achieved by it is also very small ..
can we approximate its journey from the start point to the highest point then to again to the start point as harmonic motion.
well HC verma's is good for studying Photoelectric effect and thermodynamics but aint much good for electrodynamics. As for resnik the newer the version the bettter but I would recommend Introduction to electrodynamics By DJ Griffith.