Applet by Fu-Kwun Hwang
1. red dots: kinetic energy (K = m v*v /2) of the bob 2. blue dots: potential energy (U = m g h) of the bob. Try to find out the relation between the kinetic energy and the potential energy! 3.black dots (pair) represent the period T of the pendulum.
Move the mouse to the dot in order to display information for that dot in the text field.
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Blue arrow(1): gravity
Green arrows(2): components of gravity
Red arrow (1): velocity of the bob.
Try to compare the velocity and the tangential component of the gravitational force!