Data is collected, analyzed and graphed.
Coffee can, stop watch, meter stick-one each per group of five members.
For the demonstration, a lab cart and strong slinky and pulleys, toy carts and weights. The laboratory cart is kept fixed while a student sits on it holding one length of slinky which will be pulled by teacher till the cart begins to move. This approximates a constant external force. Now two such lengths are held by the student and motion studied. Next the cart is accelerated under three lengths.