Module3- 2D and 3D Digital -mood board and improvement

mood board

originally i manually animated the coin rolling into the bottle and the bottle rolling off it he table into the basket. the result made it look inaccurate and magnetic. so i made a smaller video with a similar set up and parented both objects to a locator and setting expressions for them to roll on their own which makes it look much more realistic. below is the code i used to put an expression on the coin:
coin1.rotateZ=(coinlocator.translateX / (2 * 3.14 * 1)) * -360;