OBJECT:

To construct an INCLINED PLANE from two boards, with a plastic hinge.

MATERIALS:

Safety Goggles, Use a large board to work on, ( or a work bench or an old table ) Two boards, about 6 inches wide, one foot and two feet in length, Three plastic strips, one 4 inch by 6 inch plastic strip, with a line down the middle, will serve as hinge; the other two strips 1½ inch by 6 inch, will serve to reinforce the plastic hinge (from plastic gallon ), Small nails or tacks, Make sure that your nails are shorter then the thickness of the board ! Hammer, Later you will need a protractor, A set of books.

PROCEDURE :

1. Take the 4 inch by 6 inch plastic strip, make a line at two inches, place it on the one foot board so that 2 inches hangs over; now, at the very edge ( left side of line on the plastic ) put two nails to secure the plastic. Now place the 2 foot board under the plastic hinge, and secure this side at the opposite end, at the very edge, with two tacks. Now, take the 1 ½ inch plastic and place it on the hinge ( on the one foot board side ) leave a 1/8 inch gap from the line drawn on the plastic hinge, and secure this side of the reinforcement hinge. Take the 1 ½ plastic strip and place it on the other half of the hinge, leave a 1/8 inch gap from the line on the hinge; and secure this side of the hinge.