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ERIC Number: EJ1059615
Record Type: Journal
Publication Date: 2015-May
Pages: 6
Abstractor: As Provided
Reference Count: 3
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.
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Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A