A research group at Dartmouth College has developed a Head Impact Telemetry (HIT

Question

A research group at Dartmouth College has developed a Head Impact Telemetry (HIT) System that can be used to collect data about head accelerations during impacts on the playing field. The researchers observed 249,613 impacts from 423 football players at nine colleges and high schools and collected collision data from participants in other sports. The accelerations during most head impacts ( > 89% ) in helmeted sports caused head accelerations less than a magnitude of 400 m/s2. However, a total of 11 concussions were diagnosed in players whose impacts caused accelerations between 600 and 1800 m/s2, with most of the 11 over 1000 m/s2.

Part A

Choose from the list below the changes in the head impacts that would reduce the acceleration during the impact.

Check all that apply.

A shorter impact time interval A longer impact time interval A shorter stopping distance A longer stopping distance A smaller initial speed A larger initial speed

Explanation / Answer

2: A longer time impact interval
3: A shorter stopping distance
4: A smaller initial speed
These changes in the head impacts would reduce the acceleration during the impact.

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