How can you reduce friction?

Question

we did an experiment in science and we tied some weird machine thing to a block of wood with different types of sides - sand paper, wood, rubber, tile - to see how greatly each side affected friction.The actual question is: How can we reduce friction between the block and the table?

I need this tonight!!!

Answer 1

sand the wood or try putting vegetable oil, soap, or grease. try crisco also that work great for some weird stuff i did on a water bed once...lol

Answer 2

Make sure both surfaces which are being rubbed together are smooth.