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ERIC Number: EJ860225
Record Type: Journal
Publication Date: 2008-Feb
Pages: 2
Abstractor: As Provided
Reference Count: 0
ISSN: ISSN-0031-921X
Bouncing Balls that Spin
Knipp, Peter
Physics Teacher, v46 n2 p95-96 Feb 2008
When a ball bounces elastically against a floor, the vertical component (v[subscript y]) of the velocity of the ball's mass-center changes sign. This is a special case of the elastic collision of two balls (i.e., two objects, neither of which is much more massive than the other), in which case the balls' post-collision relative velocity (= v[subscript y1] - v[subscript y2]) is -1 times the balls' pre-collision relative velocity.
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