Related Questions

The change in length due to a tensile or compressive force acting on a body is given by (where P = Tensile or compressive force acting on the body, $$l$$ = Original length of the body, A = Cross-sectional area of the body and E = Young's modulus for the material of the body)
A $$\frac{{{\text{P}}l{\text{A}}}}{{\text{E}}}$$
B $$\frac{{{\text{P}}l}}{{{\text{AE}}}}$$
C $$\frac{{\text{E}}}{{{\text{P}}l{\text{A}}}}$$
D $$\frac{{{\text{AE}}}}{{{\text{P}}l}}$$
The natural frequency of free longitudinal vibrations is equal to (where m = Mass of the body, s = Stiffness of the body and $$\delta $$ = Static deflection of the body)
A $$\frac{1}{{2\pi }} \times \sqrt {\frac{{\text{s}}}{{\text{m}}}} $$
B $$\frac{1}{{2\pi }} \times \sqrt {\frac{{\text{g}}}{\delta }} $$
C $$\frac{{0.4985}}{{\sqrt \delta }}$$
D Any one of these
If a given force (or a given system of forces) acting on a body __________ the position of the body, but keeps it in equilibrium, then its effect is to produce internal stress in the body.
A Change
B Does not change
C Changes periodically
D None of these
If ‘P’ is the force acting on the body, ‘m’ is the mass of the body and ‘a’ is the acceleration of the body, then according to Newton's second law of motion,
A P + ma = 0
B P - ma = 0
C P × ma = 0
D $$\frac{{\text{P}}}{{{\text{ma}}}} = 0$$
A spherical body is symmetrical about its perpendicular axis. According to Routh's rule, the moment of inertia of a body about an axis passing through its centre of gravity is (where, M = Mass of the body and S = Sum of the squares of the two semi-axes.)
A $$\frac{{{\text{MS}}}}{3}$$
B $$\frac{{{\text{MS}}}}{4}$$
C $$\frac{{{\text{MS}}}}{5}$$
D None of these
The maximum frictional force , which comes into play , when a body just begins to slide over the surface of the surface of the other body, is known as
A static friction
B dynamic friction
C limiting friction
D all of these
A body of mass 500 g is fastened to one end of steel with of length 2 m and area of cross-section 2 mn2, It the breaking stress of the wire is 1.25 x 10/7, then the maximum angular velocity with which the body can be rotated in a horizontal circle is:
A 2rad/s
B 3 rad/2
C 4 rad/s
D 5 rad/s
The maximum frictional force, which comes into play, when a body just begins to slide over the surface of the other body, is known as
A static friction
B dynamic friction
C limiting friction
D coefficient of friction
When a body is subjected to two equal and opposite pulls, as a result of which the body tends to extend its length, the stress and strain induced is
A Compressive stress, tensile strain
B Tensile stress, compressive strain
C Tensile stress, tensile strain
D Compressive stress, compressive strain
When a body is subjected to two equal and opposite forces, acting tangentially across the resisting section, as a result of which the body tends to shear off across the section, the stress and strain induced is
A Tensile stress, tensile strain
B Compressive stress, compressive strain
C Shear stress, tensile strain
D Shear stress, shear strain

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