Shock 3. if (sponge layer), then a= 443 m/sec2 , G=44 Adding still more layers would eventually reduce the G level to the point where the cup would not break. This would be one way of determining what cushioning protection the cup needed to protect it from a 1 m drop. It can be seen from the cup example that time is needed over which to dissipate the impact velocity and that this time is gained by the deflection of a resilient cushioning material. This is the basic principle of cushioning against shock. v after s t = 0  = 0.01Shock 3. if (sponge layer), then a= 443 m/sec2 , G=44 Adding still more layers would eventually reduce the G level to the point where the cup would not break. This would be one way of determining what cushioning protection the cup needed to protect it from a 1 m drop. It can be seen from the cup example that time is needed over which to dissipate the impact velocity and that this time is gained by the deflection of a resilient cushioning material. This is the basic principle of cushioning against shock. v after s t = 0  = 0.01