I am currently trying to design a gear box for a toy car that is propelled by a flat coil spring for a school project. I am able to create the spring and put it in the correct orientation for the box, but I have no idea where to start with showing spring tension in relation to the motion of the gears (for example, as the wheels rotate clockwise, the gears would act on the center of the flat spring). I am fairly new to animations, so any tips to show this motion would be appreciated. I have attached an image of the spring below for context. Thank you in advance.