I learnt that, there are two types of weight plates in strength training, cast iron plates and bumper plates.
The bumper plates are coated with rubber material so that if dropped comparatively lesser damage is caused. I know this has something to do with the rubber absorbing energy but can't understand it.
If we take one in each type with same mass and drop it from the same height (neglecting air resistance and assume same contact area during impact), what is the difference between the two impacts?