Surface Area and Contact Point

Force is the product of mass and acceleration. So, logically, anything that weighs more is moving at a high velocity should create enough force to crack a windscreen. However, observations suggest otherwise. Sometimes even a small object that doesn’t even have that much weight can cause a crack on the windshield but a speeding bullet can’t. The reason for this is that the surface area of the object and its contact point with the windscreen need to be appropriate in order for an object to put a crack in the windscreen. So, if a small object hits the windshield at the right spot, it can easily crack it since al

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