Simple Machines Block and Tackle Model Chemical_Test Strips Parallelogram-of-forces apparatus on a 26

Parallelogram-of-forces apparatus on a 26 by 20 inch wall-mountable board with two clamp-on pulleys

Demonstrates inertial mass independent of gravity through a spring-steel oscillating platform with two 130 by 50mm trays

and extraocular detail for ophthalmology and sensory anatomy teaching

visualizing sound-transmission dependence on a medium

Square-topped wooden screw simple-machine model with a leverage block

Simple Machines Block and Tackle Model Chemical_Test Strips Parallelogram-of-forces apparatus on a 26Used to investigate force multiplication through multiple pulleys, this wooden block and tackle apparatus lets students count supporting strands and measure how each added pulley reduces effort.