Question

a painting in a heavy frame must be hung from a wall by a nail.

A) to keep the nail from bending too much (and possibly snapping), why would the nail need to be made of steel instead of brass?

b) to minimize any bending, should the steel nail used be thick or thin? why?

c) to minimize any bending, should the steel nail be driven in three-quarters of its length or one-quarter of its length? why?

Answer 1

A) The nail must be made of steel instead of brass to compensate the bending to elongate and compress the nail fibers. Since the modulus of elasticity of steel is higher than the brass, steel is more suitable material than brass for such heavy loads. stress induced. The bending stress acting on the nail will tends B) Write the expression for the bending stress induced in the nail My I Since the bending stress is inversely proportional inertia of the element, so it will help to decrease the bending stress for higher value. Thus, the steel nail should be thick to minimize any bending to area moment of Since hanging a heavy frame on nail forms a cantilever beam loading the nail. Higher the length of the steel nail has driven inside the wall lesser the bending of the nail. Thus, nail should be driven to three quarter of its length on