Specifications:

• The compact bench top unit has a sturdy aluminum base plate, non-slip feet and central vertical pillar.
• Pivoting on this base is a ground steel plane which can be locked in any angular position between 45, indicated on a semi-circular protractor scale.
• Each tray in turn is attached to a weight hanger and weights are added until the tray just begins to slide.
• The slider trays also allow for additional weight to be added changing the experimental scope.
• Two composite slider trays are supplied.
• One pair being made out of aluminum and steel, whilst the other is made from nylon and brass.
• The hanger cord pulls the tray up the sloping steel plane whilst passing over a pulley and bearing.
• The bearing reducing friction to ensure accurate results.
• The experiment may also be used as an exercise in equilibrium of forces, determining the force required to move the tray along the plane giving the coefficient of friction.