School of Physics Lecture Demonstration Manual

Ma-2 Monkey and Bullet

Published: Monday 20 February 2006 - Updated: Thursday 17 March 2011


To demonstrate that the accelleration experienced by a freely falling body is identical to the acceleration experienced by the vertical component of a particle in projectile motion.



Click on pictures to enlarge.

Monkey and Bullet diagram


Monkey And Bullet


The apparatus consists of a "gun" aimed at a toy monkey suspended by an electromagnet. The bullet, on leaving the barrel, activates a light sensitive switch which releases the monkey.

The gun is aimed to hit the monkey's midsection. The bullet can be aimed at different angles and distances so that collision occurs at different points of the monkey's path.

Safety notes

Electrical safety 



Knight, Physics for Scientists and Engineers, 2e (2008) Pearson, Section 4.3

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