Question Text
Question 1 :
One end of uniform wire of length $L$ and of weight $W$ is attached rigidly to a point in the roof and a weight $W_{1}$ is suspended from the lower end. If $A$ is the area of cross-section of the wire, the stress in the wire at a height $\dfrac{3L}{4}$ from its lower end is:
Question 2 :
A wire of length $5\,m$ is twisted through $30^\circ$ at the free end. If the radius of wire is $1\,mm$, the shearing strain in the wire is:
Question 3 :
One end of a uniform wire of length $L$ and of weight $W$ is attached rigidly to a point in the roof and $W_1$ weight is suspended from looser end. If $A$ is area of cross-section of the wire, the stress in the wire at a height $\dfrac{L}{4}$ from the upper end is
Question 4 :
One end of a horizongal thick copper wire of length $2L$ and radius $2R$ is welded to an end of another horizontal thin copper wire of length $L$ and radius $R$. When the arrangement is stretched by applying forces at two ends, the ratio of the elongation in the thin wire to that in the thick wire is then<br/>
Question 5 :
A thin metal sheet is being bent by or pounded in to a new shape. The process of being elastic to plastic behaviour is known as