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- Question
According to Kennedy's theorem, if three bodies have plane motions, their instantaneous centres lie on
Options- A. a point
- B. a straight line
- C. two straight lines
- D. a triangle.
- Correct Answer
- a straight line
- 1. A weight W is suspended at the free end of a light member hinged to a vertical wall. If the angle of inclination of the member with the upper wall is ?°, the force introduced in the member, is
Options- A. W sec ?
- B. W cos ?
- C. W sin ?
- D. W cosec ?
- E. W tan ?. Discuss
- 2. Varigon's theorem of moments states
Options- A. arithmetical sum of the moments of two forces about any point, is equal to the moments of their resultant about that point
- B. algebraic sum of the moments of two forces about any point, is equal to the moment of their resultant about that point
- C. arithmetical sum of the moments of the forces about any point in their plane, is equal to the moment of their resultant about that point
- D. algebraic sum of the moments of the forces about any point in their plane, is equal to the moment of their resulant about that point. Discuss
- 3. The phenomenon of collision of two elastic bodies takes place because bodies
Options- A. immediately after collision come momentarily to rest
- B. tend to compress each other till they are compressed maximum possible
- C. attempt to regain its original shape due to their elasticities
- D. all the above. Discuss
- 4. If a spherical body is symmetrical about its perpendicular axes, the moment of inertia of the body about an axis passing through its centre of gravity as given by Routh's rule is obtained by dividing the product of the mass and the sum of the squares of two semi-axes by n where n is
Options- A. 2
- B. 3
- C. 4
- D. 5. Discuss
- 5. A glass ball is shot to hit a wall from a point on a smooth floor. If the ball returns back to the point of projection in twice the time taken in reaching the wall, the coefficient of restitution between the glass ball and the wall is
Options- A. 0.25
- B. 0.33
- C. 0.40
- D. 0.50
- E. 0.55 Discuss
- 6. Angular acceleration of a particle may be expressed as
Options- A. radians/sec2
- B. degrees/sec2
- C. revolutions/sec
- D. all the above. Discuss
- 7. A ball of mass 250 g moving on a smooth horizontal table with a velocity of 10 m/sec hits an identical stationary ball B on the table. If the impact is perfectly plastic, the velocity of the ball B just after impact would be
Options- A. zero
- B. 5 m/sec
- C. 10 m/sec
- D. none of these. Discuss
- 8. One half of a vibration of a body, is called
Options- A. period time
- B. oscillation
- C. beat
- D. amplitude. Discuss
- 9. A smooth cylinder lying on its convex surface remains
Options- A. in stable equilibrium
- B. in unstable equilibrium
- C. in neutral equilibrium
- D. out of equilibrium
- E. none of these. Discuss
- 10. A sphere is resting on two planes BA and BC which are inclined at 45° and 60° respectively with the horizontal. The reaction on the plane BA will be
Options- A. less than that on BC
- B. more than that of BC
- C. equal to that on BC
- D. zero
- E. none of these. Discuss
Applied Mechanics problems
Search Results
Correct Answer: W sec ?
Correct Answer: algebraic sum of the moments of the forces about any point in their plane, is equal to the moment of their resulant about that point.
Correct Answer: all the above.
Correct Answer: 5.
Correct Answer: 0.50
Correct Answer: all the above.
Correct Answer: zero
Correct Answer: beat
Correct Answer: in unstable equilibrium
Correct Answer: more than that of BC
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