Massachusetts Institute of Technology
Sign in

Speed of a Bullet

A pair of spinning wheels 1.5 meters apart is placed in the path of a bullet. A bullet is fired with the wheels stationary for reference position, and fired again with the wheels spinning at a known speed. The second wheel will rotate more than the first as the bullet crosses the gap between them. When the angles between the reference holes and the second holes are compared, the speed of the bullet can be determined.

The balloon is used to show when the bullet has passed through both disks.

This video was shot with a Phantom v7.1 high speed video camera (donated by Vision Research Inc.) at approximately 7000 frames per second. The frame data can be seen at the bottom of the screen.

Special thanks to Dr. Jim Bales, MIT Edgerton Center.

Comments (4)

OH YEAH!!!!!!

Posted almost 8 years by Anonymous User

What effect do the spinning wheels have on the bullet's speed?

Posted almost 8 years by Anonymous User

well I believe it has no influence other than to calculate the time given by the delta of position of both wheels. May be electromagnic field in a very small scale deviate the path.

Posted almost 8 years by Anonymous User

the attempt for calculation seems to be very simple but very effetive.kindly inform how the speed of ball bowled by a bowler in cricket. they saw the path trajectory speed insant before the new ball is bowled during live broadcasting. can we apply the same techniq for measurement of speed of bullet?

Posted almost 8 years by Anonymous

You need to log in, in order to post comments.

September 02, 2008 15:08
Creative Commons Attribution-NonCommercial (What is this?)
Additional Files

47433 times

More from MIT Department of Physics Technical Services Group

MIT Physics Demo -- Conductivity of Ionized Water

MIT Physics Demo -- Conductivity of...

Added over 8 years ago | 00:00:53 | 50278 views

Orbital Motion

Orbital Motion

Added over 7 years ago | 00:03:00 | 46335 views

Coupled Air Carts

Coupled Air Carts

Added over 7 years ago | 00:07:38 | 53226 views

MIT Physics Demo -- Centrifugal versus Centripetal Motion

MIT Physics Demo -- Centrifugal ver...

Added 8 years ago | 00:01:18 | 37253 views

Relative Motion Gun

Relative Motion Gun

Added over 7 years ago | 00:01:07 | 57146 views

Ripple Tank: Interference of Two Point Sources

Ripple Tank: Interference of Two Po...

Added over 7 years ago | 00:01:41 | 49844 views