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 $$\frac{{{\text{AE}}}}{{{\text{P}}l}}$$
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
Which of the following acts as an insulator against heat, cold and as a shock-absorber in the body?
A Dermis
B Epidermis
C Subcutaneous fat layer
D None of the above
Effect of a force on a body depends upon
A Magnitude
B Direction
C Position or line of action
D All of the above
Effect of a force on a body depends upon its
A Direction
B Magnitude
C Position
D All the above
The fibrous membranes surrounding organs in the human body are tough _______ add strength to the parts of the body they cover.
A moreover
B furthermore
C since
D and
When human body is infected by infection __________ type of cells are activated to defend the body.
A erythrocytes
B leukocytes
C lymphocytes
D monocytes
The human body feels comfortable when the heat stored in the body is
A Positive
B Negative
C Zero
D None of these
The human body feels comfortable when the heat stored in the body is -
A Positive
B Negative
C Zero
D None
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

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