"Wards"

Compare the falling rate of a feather and a guinea (coin) with air resistance and in a vacuum.

Friction blocks are useful for teaching the basics of force and motion.

Precisely centered aluminum pulleys.

Long lasting metal Pulley.

Economical pulley for simple machine experiments.

Economical pulley for simple machine experiments.

Economical pulley for simple machine experiments.

Economical pulley for simple machine experiments.

Economical pulley for simple machine experiments.

Economical pulley for simple machine experiments.

Economical pulley for simple machine experiments.

Economical pulley for simple machine experiments.

Bench mounted aluminum pulley.

Pulley attached to universal clamp.

Pulley with metal clamp attached.

Plastic pulley with two- part aluminum frame.