The centre of percussion is below the centre of gravity of the body and is at a distance equal to

A h / kG
B h.kG
C h2/kG
D k2G/h

Correct Answer: k2G/h

The centre of oscillation is sometimes termed as centre of percussion. It is defined as that point at which a blow may be struck on a suspended body so that the reaction at the support is zero. The centre of percussion is below the centre of gravity and at a distance k2G/h. The distance between the centre of suspension and the centre of percussion is equal to the equivalent length of a simple pendulum.
Bissoy MCQ
#Machine Kinematics #Simple Harmonic Motion

Related Questions

When the body is suspended at the point of suspension, its periodic time and frequency will be ________ as compared to the body suspended at the point of percussion.
A Same
B Two times
C Four times
D None of these
If a suspended body is struck at the centre of percussion, then the pressure on die axis passing through the point of suspension will be
A Maximum
B Minimum
C Zero
D Infinity
The periodic time of a compound pendulum is __________ when the distance between the point of suspension and the center of gravity is equal to the radius of gyration of the body about its center of gravity.
A Zero
B Minimum
C Maximum
D None of these
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
If a suspended body is struck at the center of percussion, then the pressure on die axis passing through the point of suspension will be
A Maximum
B Minimum
C Zero
D Infinity
The centre of percussion of a solid cylinder of radius r resting on a horizontal plane will be
A $$\frac{{\text{r}}}{2}$$
B $$\frac{{2{\text{r}}}}{3}$$
C $$\frac{{\text{r}}}{{\text{A}}}$$
D $$\frac{{3{\text{r}}}}{2}$$
The centre of percussion of the homogeneous rod of length ‘L’ suspended at the top will be
A $$\frac{{\text{L}}}{2}$$
B $$\frac{{\text{L}}}{3}$$
C $$\frac{{3{\text{L}}}}{4}$$
D $$\frac{{2{\text{L}}}}{3}$$
The centre of pressure for a vertically immersed surface lies at a distance equal to __________ the centre of gravity.
A $$\frac{{{I_{\text{G}}}}}{{{\text{A}}\overline {\text{x}} }}{\text{ below}}$$
B $$\frac{{{I_{\text{G}}}}}{{{\text{A}}\overline {\text{x}} }}{\text{ above}}$$
C $$\frac{{{\text{A}}\overline {\text{x}} }}{{{I_{\text{G}}}}}{\text{ below}}$$
D $$\frac{{{\text{A}}\overline {\text{x}} }}{{{I_{\text{G}}}}}{\text{ above}}$$
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 $$\frac{{{\text{AE}}}}{{{\text{P}}l}}$$
Center of percussion is
A The point of C.G.
B The point of metacenter
C The point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis
D Point of suspension

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