Applied Mechanics problems
- 1. Angular acceleration of a particle may be expressed as
Options- A. radians/sec2
- B. degrees/sec2
- C. revolutions/sec
- D. all the above. Discuss
Correct Answer: all the above.
- 2. 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
Correct Answer: zero
- 3. One half of a vibration of a body, is called
Options- A. period time
- B. oscillation
- C. beat
- D. amplitude. Discuss
Correct Answer: beat
- 4. 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
Correct Answer: in unstable equilibrium
- 5. 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
Correct Answer: more than that of BC
- 6. A ball which is thrown upwards, returns to the ground describing a parabolic path during its flight
Options- A. vertical component of velocity remains constant
- B. horizontal component of velocity remains constant
- C. speed of the ball remains constant
- D. kinetic energy of the ball remains constant. Discuss
Correct Answer: horizontal component of velocity remains constant
- 7. In case of S.H.M. the period of oscillation(T), is given by
Options- A.
- B.
- C.
- D.
Discuss
Correct Answer:
- 8. On a ladder resisting on a smooth ground and leaning against a rough vertical wall, the force of friction acts
Options- A. towards the wall at its upper end
- B. away from the wall at its upper end
- C. upwards at its upper end
- D. downwards at its upper end
- E. none of these. Discuss
Correct Answer: upwards at its upper end
- 9. A satellite goes on moving along its orbit round the earth due to
Options- A. gravitational force
- B. centrifugal force
- C. centripital force
- D. none of these. Discuss
Correct Answer: centrifugal force
- 10. A heavy ladder resting on a floor and against a vertical wall may not be in equilibrium, if
Options- A. floor is smooth and the wall is rough
- B. floor is rough and the wall is smooth
- C. floor and wall both are smooth surfaces
- D. floor and wall both are rough surfaces. Discuss
Correct Answer: floor and wall both are smooth surfaces
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