Question

Dr. Pearce is making signs in the shape of a “T” for her garden. The top of the sign is held to the post by two nails, one 1cm and one 1.5cm from the center horizontally. This is a similar set-up to your lab with forces acting on a horizontal ruler. If the top of the sign is 100g, what are the two upward forces the nails exert on the top of the sign? Why does Dr. Pearce need two nails to prevent the sign from tilting?

Answer 1