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 the weight of a body immersed in a fluid exceeds the buoyant force, then the body will
A rise until its weight equals the buoyant force
B tend to move downward and it may finally sink
C float
D none of the above
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 $$\frac{{\text{P}}}{{{\text{ma}}}} = 0$$
The line of action of the buoyant force acts through the
A Centroid of the volume of fluid vertically above the body
B Centre of the volume of floating body
C Center of gravity of any submerged body
D Centroid of the displaced volume of fluid
The horizontal component of buoyant force is
A Negligible
B Same as buoyant force
C Zero
D None of the above
Thee horizontal component of buoyant force is
A negligible
B same as buoyant force
C zero
D none of the above
Buoyant force is
A resultant force acting on a floating body
B equal to the volume of liquid displaced
C force necessary to keep a body in equilibrium
D the resultant force on a body due to the fluid surrounding it
The line of action of the buoyant force acts through the centroid of the
A submerged body
B volume of the floating body
C volume of the fluid vertically above the body
D displaced volume of the fluid
Which of the following physicists explained the existence of Buoyant force?
A Archimedes
B Blaise Pascal
C Charles Augustine de Coulomb
D Issac Newton

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