(see the imported image)
I want to do is that my object that is the blue ball, when it collides with one of the platforms have a bounce in either direction that are marked in red, but the platforms move in a circular direction, so that the angle will change and this is my problem.
Somebody help me.
you can define angle at start and end of paddle (like at start it is 135 and at end 60) then calculate at which point of paddle it hit from local position
for example paddle is 100x units wide, you hit it at x15 which is 15% of whole paddle and then set bounce angle 15% of 135-60 which would be about 110 (15% less of 135) and bounce off at angle of 110 from paddle.
this is kind of crude explanation and hard to see but i hope you get it 
or maybe some1 can explain it better