NotesFAQContact Us
Collection
Advanced
Search Tips
Peer reviewed Peer reviewed
Direct linkDirect link
ERIC Number: EJ1032984
Record Type: Journal
Publication Date: 2014-Mar
Pages: 3
Abstractor: As Provided
Reference Count: 4
ISBN: N/A
ISSN: ISSN-0031-921X
Measuring the Drag Force on a Falling Ball
Cross, Rod; Lindsey, Crawford
Physics Teacher, v52 n3 p169-171 Mar 2014
The effect of the aerodynamic drag force on an object in flight is well known and has been described in this and other journals many times. At speeds less than about 1 m/s, the drag force on a sphere is proportional to the speed and is given by Stokes' law. At higher speeds, the drag force is proportional to the velocity squared and is usually small compared with the gravitational force if the object mass is large and its speed is low. In order to observe a significant effect, or to measure the terminal velocity, experiments are often conducted with very light objects such as a balloon or coffee filter or muffin cup, or are conducted in a liquid rather than in air. The effect of the drag force can also be increased by increasing the surface area of the object.
American Association of Physics Teachers. One Physics Ellipse, College Park, MD 20740. Tel: 301-209-3300; Fax: 301-209-0845; e-mail: pubs@aapt.org; Web site: http://scitation.aip.org/tpt
Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A