Which of the Following Best Describes Why the Occupants of a Vehicle

question 70

Multiple Choice

Which of the following best describes why the occupants of a vehicle moving at 50 miles per hour will be injured when the vehicle strikes a tree, but not when it brakes to a stop?

• A) Braking allows the kinetic energy to be absorbed evenly into the frame of the vehicle, rather than concentrating it at the point of impact.
• B) The energy gradually dissipates as heat due to the friction of braking, rather than transferring to the vehicle and its occupants.
• C) The inertia of the tree increases the kinetic energy transmitted to the occupants by a factor of 10.
• D) None of the above describes why.

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