Equipment: A tennis ball on a string. What it does: Swing the ball on the string to show circular motion. Release the ball to show the instantaneous velocity of the ball. Concepts Demonstrated: ...

[1] Tennis ball on a string threaded through a glass tube [1] Alligator clip [1] 200 g mass Classroom Assembly Attach the 200 g mass to the end of the string and place it on the table. Adjust the ...