First of all welcome to the C2 community then <img src="smileys/smiley1.gif" border="0" align="middle">
Second... Fruit ninja might not be the easiest game to start with, it does involve some complicated methods.
That said. Have a look in the FAQ section
There is a topic on how to to slash/dash like in fruit ninja. (search the page for "fruit ninja" to find it) In general the FAQ section hold a great deal of information on various great topics.
For "throwing" the fruit onto the screen have a look at the physics behavior. You could create the object outside of the layout, apply an impulse in a direction.
Have fun with your project, and let us know if you get stuck, then we will be happy to help. <img src="smileys/smiley1.gif" border="0" align="middle">