Dip Needle

Set of 8 of different cubes, various wood. Supplied in wooden/plastic case

Comprises a lightweight aluminum track with leveling screws and cushioned stops at either end, pulley fixed towards one end, clamp for vibrator and automatic pen release.
A metal trolley with ball bearing mounted wheels to minimize friction, has five holes for accommodating cylindrical masses, including is a vibrator and pen holder with one each wooden blocks, to demonstrate the experiments on acceleration.