When the projectile is in motion what is the net work done on projectiles?
What i think? 0
first view: We know when we throw projectiles the initial KE and final KE is 0. So from work energy theoram the net work done must be 0.
second view: Lets see from the perpective from x direction and y direction. In X direction velocity is constant meaning there is no acceleration which in turn means force is 0 and in Y direction there is no displacement and $Work done = F \times displacement$ so it is zero in Y direction as well. So overrall net work done is zero.
Problem: when I googled i find many answer not written direclty 0. Here is a link http://answers.yahoo.com/question/index?qid=20101111093951AAtRsWP
I am currently reading GCSE mechanics and all the mathematical modelling is true such as neglecting air resistance . So lets see it from classical physics view only.