Practice Quiz

NREMT Paramedic

Category - Trauma

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What relationship does the speed of an object have with kinetic energy?
  1. An object’s mass completely determines its kinetic energy.
  2. An object’s speed has little to do with its kinetic energy.
  3. Only the object’s speed determines its kinetic energy.
  4. Mass and speed of an object both play a role, but speed has a greater influence on kinetic energy.
Explanation
Answer: D - An object’s kinetic energy, or the energy an object possesses due to its motion, is influenced by its mass and velocity, though its velocity exponentially - or overwhelmingly - influences its energy. Thus the same car (mass) going 10 mph faster has greatly magnified energy and therefore potential to injure.
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