query: How - The force of a 60 mph crash is not just twice as great as a 30 mph crash; it’s four times as great!
positive_passages.docid: 4821
positive_passages.text: Why does kinetic energy increase quadratically, not linearly, with speed?
negative_passages.docid: 56664
negative_passages.text: Is two cars colliding at 50mph the same as one car colliding into a wall at 100 mph?
negative_passages.docid: 26439
negative_passages.text: The problem of instant velocity
negative_passages.docid: 125082
negative_passages.text: Why is force a vector?
negative_passages.docid: 119740
negative_passages.text: What, if anything, makes forces the "cause" and acceleration the "effect"?
negative_passages.docid: 47638
negative_passages.text: Mass and Newton's Second Law
negative_passages.docid: 151973
negative_passages.text: Why do heavier objects fall faster on hills but not in straight drops?
negative_passages.docid: 144615
negative_passages.text: How much work can a force on a spring do? (Why are two methods wrong?)
negative_passages.docid: 104754
negative_passages.text: Parallelogram Law of Force Addition
negative_passages.docid: 120645
negative_passages.text: Why can't humans throw objects at bullet speed when the force involved seems so small?
negative_passages.docid: 120287
negative_passages.text: Is there a maximum possible acceleration?
negative_passages.docid: 19442
negative_passages.text: Frictional forces opposing motion
negative_passages.docid: 130347
negative_passages.text: Why do objects with different masses fall at the same rate?
negative_passages.docid: 67130
negative_passages.text: Why and how is sound produced when two objects hit each other?
negative_passages.docid: 122902
negative_passages.text: Kinetic energy conservation in a collision
negative_passages.docid: 78062
negative_passages.text: Please help understanding the difference between force and kinetic energy for an object hitting a wall?
negative_passages.docid: 23127
negative_passages.text: Don't heavier objects actually fall faster because they exert their own gravity?