Code Number: 1D60.75
Demo Title: Parabolic Falling Droplets - Blood Spatter
Condition: Good
Principle: Projectile Motion
Area of Study: Mechanics
Equipment:
White Formica Board, Large Sheet of Paper, Syringe, Special Effects Blood.
Procedure:
This demo is related to Forensic science where the determination is being made as to whether a blood droplet is dropped straight down from a non-moving person, or whether the person was moving, and in which direction they were moving when the blood was dropped.
Special Effects Blood Recipe
Adapted from Special Effects Unlimited Inc.’s recipe, as revealed in the Insider video “How Fake Blood is Made for Movies.”
1. Start with base: Corn syrup
2. Add soap/ glycerin until desired consistency is achieved
3. Add lots of red food coloring, and a few drops of blue (just red makes it look like cough syrup, not blood)
References:
- Scott Hertting, "Stunt Barbie - A Laboratory Practicum Combining Velocity and Constant Acceleration", TPT, Vol. 49, #4, April 2011, p. 238.
- Greg W. Lowe and Eric Ayars, "Measuring the Flight Speed of Fire Bombers from Photos: An In-Class Exercise in Introductory Kinematics", TPT, Vol. 48, #2, Feb. 2010, p. 106.
- Jeffrey Wetherhold, "A Toy Airplane for Projectile - Motion Experiments", TPT, Vol. 39, #2, Feb. 2001, p. 116.
- Doug Forrest, "Raw Eggs - Moving Target", TPT, Vol. 37, # 6, Sept. 1999, p. 371.
- Andrew DePino, Jr., "Easy Projectile- Motion Demonstrations", TPT, Vol. 37, #5, May 1999, p. 266.
- 7-2.12, Harry F. Meiners, Physics Demonstration Experiments.