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Forces on hockey players: vectors, work, energy and angular momentum
Landskrona.
Landskrona.
Högskolan Kristianstad, Fakulteten för lärarutbildning, Forskningsmiljön Learning in Science and Mathematics (LISMA). Högskolan Kristianstad, Fakulteten för lärarutbildning, Avdelningen för matematik- och naturvetenskapernas didaktik. Nationellt resurscentrum för fysik, Lunds universitet. (LISMA)ORCID-id: 0000-0001-6638-1246
Lunds Universitet.
2019 (engelsk)Inngår i: European Journal of PhysicsArtikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
2019.
HSV kategori
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URN: urn:nbn:se:hkr:diva-19702DOI: 10.1088/1361-6404/ab3146OAI: oai:DiVA.org:hkr-19702DiVA, id: diva2:1337562
Tilgjengelig fra: 2019-07-16 Laget: 2019-07-16 Sist oppdatert: 2019-07-16bibliografisk kontrollert

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