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ERIC Number: EJ1059615
Record Type: Journal
Publication Date: 2015-May
Pages: 6
Abstractor: As Provided
Reference Count: 3
ISBN: N/A
ISSN: ISSN-0031-9120
Reaching Higher Goals by Means of a Reflecting Wall
Faella, Orazio; De Luca, Roberto
Physics Education, v50 n3 p352-357 May 2015
A student realizes that a point particle that is able to rise at a given point P[subscript 0] at height H when launched vertically from the origin O of a Cartesian plane at a fixed initial speed V[subscript 0] cannot reach, by means of a direct shot from a small spring cannon, a point P positioned at the same height H and distance d from P[subscript 0], with 0 < d = R, where R is the maximum horizontal distance attainable with an optimum throw at an angle of 45°. However, the student realizes that, in the absence of air resistance, conservation of energy does not prevent this possibility. Therefore, in order to reach point P, the student uses a perfectly reflecting surface, opportunely inclined with respect to the horizontal. The full story of how this is done will be narrated in this article.
Institute of Physics Publishing. The Public Ledger Building Suite 929, 150 South Independence Mall West, Philadelphia, PA 19106. Tel: 215-627-0880; Fax: 215-627-0879; e-mail: info@ioppubusa.com; Web site: http://journals.iop.org
Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A