Shaalaa.com | stress and strain
A steel wire-of diameter 1 x 10-3m is stretched by a force of 20 N. Calculate the strain energy per unit volume.(Y steel= 2 x 1011 N /m2)
The area of the upper face of a rectangular block is 0.5 m by 0.5 m and the lower face is fixed. The height of the block is 1 cm. A shearing force applied at the top face produces a displacement of 0.015 mm. Find the strain and shearing force.
(Modulus of rigidity: η = 4.5 x 1010 N/m2)
A uniform steel rod of 5 mm2 cross section is heated from 0°C to 25°C. Calculate the force which must be exerted to prevent it from expanding. Also calculate strain.
(α for steel = 12 x 10-6/°C and γ for steel = 20 x 101ON/m2)
A steel wire having cross sectional area 1.5 mm2 when stretched by a load produces a lateral strain 1.5 x 10-5. Calculate the mass attached to the wire.
(Ysteel = 2 x 1011 N/m2, Poisson’s ratio σ = 0.291,g = 9.8 m/s2)
The graph between applied force and change in the length of wire within elastic limit is a.......................
- straight line with positive slope.
- straight line with negative slope.
- curve with positive slope.
- curve with negative slope.
Velocity of transverse wave along a stretched string is proportional to _______. (T = tension
in the string)