Shifting from pure science to applied science/mathematics

[IamWitten]

I am a second year undergraduate in Pure Math and Theoretical Physics. I have decided to study applied mathematics or applied physics in grad school.  Does anyone have a similar experience? 

In particular, I would like to know 

1.I have not taken any applied science/mathematics courses till now. I am planning to take them next sem onwards. Is it a bad thing on my application?

2. Does having a theoretical background, put me in a "This guy can't succeed in applied stuff" position ?

3. When someone shifts subjects, what exactly does the grad school expect in the application, other than relevant coursework and grades ?