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Written by Palak Mall, Senior Content Writer · reviewed by Arvind Kumar, Lab Equipment Specialist, 12+ years in laboratory supply · updated 17 October 2026

Force & Friction lists five items for statics and friction practicals in school and college physics labs: two force tables for adding forces as vectors, and three hinged boards, an inclined plane, a simple inclined plane and a friction board, for sliding and rolling friction. Sizes below are the ones given in each listing.

Force tables

Feature	Student Force Table	Force Table
Table	Metal, 30 cm in diameter, edge graduated through 360°	Machined aluminium, 40 cm in diameter, rim graduated through 360°
Stand	Heavy vertical rod on a tripod base	Heavy vertical rod on a tripod base with levelling screws
Pulleys	Three sliding clamp pulleys	Four low-friction pulleys
Weights supplied	Ring, three weight hangers and 12 weights: 2 x 10 g, 2 x 20 g, 4 x 50 g and 4 x 100 g	Central ring, four 50 g weight hangers and four sets of brass slotted weights

Both are listed for verifying the laws of composition and resolution of forces. Strings from the central ring run over the pulleys to hanging weights, and the pulleys are moved round the scale until the ring sits centred, with no string pulling it off. The forces are then in equilibrium, and any one of them is equal and opposite to the resultant of the others. The four-pulley table allows problems with four forces, and its listing adds that it can be turned into a teaching spectrometer with a suitable collimator, telescope and prism or grating support.

Inclined planes and friction board

Item	What the listing specifies
Inclined Plane	Wooden plane 600 x 100 x 20 mm with a 22 mm pulley, hinged to a wooden base 450 x 100 x 20 mm; linear scale on the edge of the plane, vertical linear and 0 to 45° angle scales on the base with a clamp; scale pan 75 mm in diameter, cord, hooks and a roller 100 x 18 mm
Inclined Plane, Simple	Plane board 600 x 75 mm hinged to its base, with a pulley for the force cord; brass roller 75 mm long and 25 mm in diameter and a scale pan; supplied without masses
Friction Board	Planed board 600 x 75 mm hinged at one end, with a pulley for the force cord at the other and a movable block to set the angle; reversible friction slider 100 x 65 mm with one side cut away over half its area; supplied without masses or scale pan

Two classic results come from these boards. Raising the plane until the slider just begins to slip gives the coefficient of static friction as the tangent of that angle, which the 0 to 45° scale on the Inclined Plane reads directly. Turning the friction slider over, so that only half its area touches the board, shows that the friction force barely changes with the area of contact. The rollers supplied with the two inclined planes let a class compare rolling with sliding friction.

Which board to choose

For measured friction angles and force-along-the-plane work, the Inclined Plane, which has its own scales, pan, cord and roller.
For a simpler class set, the Inclined Plane, Simple, supplied with a roller and scale pan; masses are ordered separately.
For the area-of-contact experiment, the Friction Board with its half-cut reversible slider.

Related ranges

This range is part of Mechanics & Fluid Mechanics. Slotted and hooked weights and spring balances for these boards are under Weights & Balances, pulleys under Pulleys, and wheel-and-axle sets under Energy Conservation.

Questions buyers ask

What is the difference between the two force tables?
The Student Force Table has a 30 cm metal table, three pulleys and 12 weights. The Force Table has a 40 cm aluminium table, four pulleys, levelling screws and four sets of brass slotted weights.

Are masses supplied with the inclined planes?
No. The simple inclined plane and the friction board are listed without masses, and the friction board also without a scale pan. The Inclined Plane comes with a scale pan, cord, hooks and roller.

How is the coefficient of friction found on an inclined plane?
Raise the plane until the block just starts to slide and read the angle. The coefficient of static friction is the tangent of that angle.

What is the half-cut side of the friction slider for?
It halves the area in contact with the board while the weight stays the same, to show that sliding friction hardly depends on contact area.