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Forces on hockey players: vectors, work, energy and angular momentum
Landskrona.
Landskrona.
Kristianstad University, Faculty of Education, Research environment Learning in Science and Mathematics (LISMA). Kristianstad University, Faculty of Education, Avdelningen för matematik- och naturvetenskapernas didaktik. Nationellt resurscentrum för fysik, Lunds universitet. (LISMA)ORCID iD: 0000-0001-6638-1246
Lunds Universitet.
2019 (English)In: European Journal of PhysicsArticle in journal (Refereed) Accepted
Abstract [en]

Non-traditional examples can be very inspiring for students. This paper applies classical mechanics to different ways of skating in ice hockey.
 Skating blades glide easily along the ice in the direction of the blade. Horizontal forces on the skates are thus essentially perpendicular to the blade. Speed skaters glide long distances on each skate before pushing off for the next stride. A hockey player running for the puck may take a number quite short steps in a short explosive rush before shifting to longer strides, where the recurring need to change direction requires additional work by the skater. This paper investigates an alternative stride, with a longer gliding phase in a circular arc, where the centripetal force provided by the ice acting on the skates, changes the direction of motion, without the need for additional energy. In addition, the conservation of angular momentum leads to increased speed as the centre of mass is shifted closer to the centre of the circular arc.
 Finally, we discuss an angular momentum based technique to reverse the direction of motion as fast as possible.

Place, publisher, year, edition, pages
2019.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:hkr:diva-19702DOI: 10.1088/1361-6404/ab3146OAI: oai:DiVA.org:hkr-19702DiVA, id: diva2:1337562
Available from: 2019-07-16 Created: 2019-07-16 Last updated: 2019-07-16Bibliographically approved

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Publisher's full texthttp://iopscience.iop.org/10.1088/1361-6404/ab3146

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CiteExportLink to record
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Cite
Citation style
  • apa
  • harvard1
  • ieee
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  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
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