Using a length of light cord, show that the pendulum can be drawn aside it pulled gently, laquot;Jt that the cord breaks if yanked suddenly, ... .1 large knife to cut part way through an apple or a potato. then strike the knife, cutting-blade up, on the edge of thr table to sliec through completely. Or with the knife part way through the object , hold it in the air and strike the back of the knife a sharp blow, to finish the cut.
|Author||:||University of the State of New York. Bureau of Secondary Curriculum Development|