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- Question
Kinetic friction may be defined as
Options- A. friction force acting when the body is just about to move
- B. friction force acting when the body is in motion
- C. angle between normal reaction and resultant of normal reaction and limiting friction
- D. ratio of limiting friction and normal reaction.
- Correct Answer
- friction force acting when the body is in motion
- 1. Two loads of 50 kg and 75 kg are hung at the ends of a rope passing over a smooth pulley shown in below figure. The tension in the string is :
Options- A. 50 kg
- B. 75 kg
- C. 25 kg
- D. 60 kg. Discuss
- 2. ω rad/sec is the angular velocity of a crank whose radius is r. If it makes θ° with inner dead centre and obliquity of the connecting rod l is φ, the velocity v of the piston, is given by the equation
Options- A. ω2(l cos φ + r sin φ tan θ)
- B. ω2(l sin φ + r cos φ tan θ)
- C. ω(l sin φ + r cos φ tan θ)
- D. ω2(l sin φ - r cos θ tan φ). Discuss
- 3. 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
- 4. 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
- 5. 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
- 6. For a particle moving with a simple harrmonic motion, the frequency is
Options- A. directly proportional to periodic time
- B. inversely proportional to periodic time
- C. inversely proportional to its angular velocity
- D. directly proportional to its angular velocity
- E. none of these. Discuss
- 7. A stone is whirled in a vertical circle, the tension in the string, is maximum
Options- A. when the string is horizontal
- B. when the stone is at the highest position
- C. when the stone is at the lowest position
- D. at all the positions. Discuss
- 8. From the circular plate of a diameter 6 cm is cut out a circular plate whose diameter is equal to radius of the plate. The c.g. of the remainder shifts from the original position through
Options- A. 0.25 cm
- B. 0.50 cm
- C. 0.75 cm
- D. 1.00 cm. Discuss
- 9. A retarding force on a body does not
Options- A. change the motion of the body
- B. retard the motion of the body
- C. introduce the motion of the body
- D. none of these. Discuss
- 10. The units of inertia of mass, are
Options- A. kg/m
- B. kg/m2
- C. m4
- D. m3
- E. kg-m2. Discuss
Applied Mechanics problems
Search Results
Correct Answer: 60 kg.
Correct Answer: ω(l sin φ + r cos φ tan θ)
Correct Answer: floor and wall both are smooth surfaces
Correct Answer: centrifugal force
Correct Answer: upwards at its upper end
Correct Answer: inversely proportional to periodic time
Correct Answer: when the stone is at the lowest position
Correct Answer: 0.50 cm
Correct Answer: retard the motion of the body
Correct Answer: kg-m2.
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