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ERIC Number: EJ1004651
Record Type: Journal
Publication Date: 2013-Jan
Pages: 2
Abstractor: As Provided
Reference Count: 8
ISSN: ISSN-0031-921X
Supersonic Jump
Muller, Andreas
Physics Teacher, v51 n1 p14-15 Jan 2013
On October 14,2012, Felix Baumgartner, an Austrian sky-diver, set some new world records for his discipline. Jumping from a height of about 39 km, he reached a top speed of 1342 km/h, becoming the first human being to break the sound barrier in free fall. In order to understand some essential physics aspects of this remarkable feat, we wonder why his start height had to be that high (when the tremendous effort that was necessary for leaping from such a height required $50 million, as reported in the press). More precisely, can you give an estimate for the minimal start height--which we will call the Baumgartner limit, z[subscript B]--of a sky diver who wants to break the sound barrier in free fall?
American Association of Physics Teachers. One Physics Ellipse, College Park, MD 20740. Tel: 301-209-3300; Fax: 301-209-0845; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A