PURPOSE: To illustrate two-dimensional kinematics with a student activity.

DESCRIPTION: The subject walks along a line with his/her arm straight out holding a ball. As the subject passes a bucket, where must she/he release the ball so that it will fall into the bucket?

SUGGESTIONS: Use demonstration 1D60.60 TRAJECTORY OF BALL MODEL to help explain the observations.

REFERENCES: This experiment is described in a reference paper on the relation between development of physical intuition in children and their understanding of the laws of motion.

EQUIPMENT: Ball, bucket, and victim, as photographed.

SETUP TIME: None.

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