A driver in a car sees a deer run out into the road and puts on the brakes. Unfortunately the car hits the deer. Explain why it is much more likely that the deer will be severely injured if the car was travelling at 40 miles per hour than if it was travelling at 30 miles per hour.

Expert Answers

An illustration of the letter 'A' in a speech bubbles

If the driver applies brakes, the vehicle will accelerate and ultimately stop. However, the distance that it travels before stopping (even after the application of the brakes) is known as the stopping distance. Thus, higher the travel speed, more will be the stopping distance. If the vehicle is at running at 40 miles per hour, it will require more distance and time to stop than if it was running at 30 miles per hour. Hence, at the point of impact, car that was traveling at 40 miles per hour will have a higher speed and consequently a higher momentum (at the point of collision), as compared to the scenario when the car was running at 30 miles per hour. A higher momentum will impact the deer more severely as compared to a lower momentum, thus, injuring it more severely.

Hope this helps. 

 

Approved by eNotes Editorial Team

We’ll help your grades soar

Start your 48-hour free trial and unlock all the summaries, Q&A, and analyses you need to get better grades now.

  • 30,000+ book summaries
  • 20% study tools discount
  • Ad-free content
  • PDF downloads
  • 300,000+ answers
  • 5-star customer support
Start your 48-Hour Free Trial