Massachusetts Institute of Technology
Sign in | Create Account

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 over 5 years by Anonymous User

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

Posted over 5 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 over 5 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 over 5 years by Anonymous

You need to log in, in order to post comments. If you don’t have an account yet, sign up now!

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


Viewed
43180 times

More from MIT Department of Physics Technical Services Group

Gyroscopes Made Easy

Gyroscopes Made Easy

Added 2 years ago | 00:29:09 | 4076 views

The Coriolis Effect

The Coriolis Effect

Added over 4 years ago | 00:03:00 | 74205 views

MIT Physics Demo -- Exploding Wire

MIT Physics Demo -- Exploding Wire

Added over 5 years ago | 00:02:00 | 54205 views

Fiber Optic Bundle

Fiber Optic Bundle

Added almost 2 years ago | 00:01:20 | 3611 views

Ring Falling in a Magnetic Field

Ring Falling in a Magnetic Field

Added over 2 years ago | 00:03:27 | 9466 views

Ripple Tank: Interference of Two Point Sources

Ripple Tank: Interference of Two Po...

Added over 4 years ago | 00:01:41 | 45760 views