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Irregular lamina with marked center-of-mass tossed in air.

What it shows:

The center of gravity fixed in (or outside) the object always orients itself with minimum potential energy on a vertical line below the support point. When an irregular shape is...

Which road is faster? A kinematics concept Puzzler.

What it shows:

Horizontal and vertical motions are independent of each other.

How it works:

Two balls, starting with the same initial horizontal velocity, take two different paths: the one taking the high...

Ball drops from mast of PASCO cart; its motion can be considered relative to the moving cart or the track frame of reference.

Glider acceleration by an inclined air track or by a falling weight/string attachment; large ballbearing rolling on PASCO track (with strings).

Time lapse image of a ping pong ball rolling down an inclined track. The bottom image has computer generated...

What It Shows

Rumor has it that one day at the cathedral, Galileo watched the swinging of a chandelier after it had been displaced and lit. By using his own pulse as a timer, he...

An image current is created in a ferromagnetic material in the presence of a real current.

What It Shows:

The demonstration is a realization of problem 5.17 in J.D. Jackson's Classical Electrodynamics, 3rd ed, (John Wiley & Sons, 1999) p.229. To paraphrase...