This set includes a friction block and a
friction board, both made of high quality, smoothly finished pine
wood. The friction block has a hook for a spring scale and three
compartments for additional weights. It can be placed face-up or
sideways. Students can vary the weight or area of contact to test
their impact on the frictional force. The set comes with three 50g
weights and a 100g spring scale.
The board is 20" x 2" and the block
is 4" x 1.5" x 1".
Includes an activity guide.