What are some of the uses of physics?

The answer of this question won't fit in this context of Q & A but let me throw some light on your question, as you know Neeraj Chopra is news nowadays and if you see your chapter in physics which explains Projectile motion, I think you can co-relate both of them and understand how you can help him winning more medals.

Similarly goes with different sports like basketball, in simple terms it is just bouncing the ball and throwing it in the hoop, but look closely and you will see that application of reflection works pretty good here, you have to throw it with particular angle so can get it back accordingly same with throwing in hoop if direct shoot then application of Projectile if board shoot then application of reflection and if you want show some moves then you have to application of inertia if have seen basketball games.

Another example you can see how a ball swings in the game of cricket it is nothing but example of pressure difference and so on.

As I said this context won't cover the uses of physics, join any good class of physics and you will know and learn 

1.Use of light : without light we can't see anything, in physics we study light it's properties as well.

2.Use of ball pen, as it is based on gravity . Gravity pushes ink downward.

3.In Vehicle horn and alarm clock use of Sound : In physics we study origin of sound and it's propagation.

4. Heat : In physics we study heat it's property and transfer of heat. In our daily life we use heated press to ironing clothes where transfer of heat takes place. 

5. Friction force : without friction impossible to move., Physics tells kind of friction associated with different motion like waking.