43) The center of percussion of a solid cylinder of radius r resting on a horizontal plane will be

r/2

2r/3

r/A

3r/2

Answer is:

3r/2

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44) In the equation of virtual work, following force is neglected

reaction of any smooth surface with which the body is in contact

reaction of a rough surface of a body which rolls on it without slipping

reaction at a point or an axis, fixed in space, around which a body is con-strained to turn

all of the above

Answer is:

all of the above

45) 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

maximum

minimum

zero

infinity

Answer is:

zero

46) The resultant of the following three couples 20 kg force, 0.5 m arm, $ ve sense 30 kg force, 1 m arm, - ve sense 40 kg force, 0.25 m arm, + ve sense having arm of 0.5 m will be

20 kg, - ve sense

20 kg, + ve sense

10 kg, + ve sense

10 kg, - ve sense

Answer is:

20 kg, - ve sense

47) Angle of friction is the

angle between normal reaction and the resultant of normal reaction and the limiting friction

ratio of limiting friction and normal reaction

the ratio of minimum friction force to the friction force acting when the body is just about to move

the ratio of minimum friction force to friction force acting when the body is in motion

Answer is:

angle between normal reaction and the resultant of normal reaction and the limiting friction

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43) The center of percussion of a solid cylinder of radius r resting on a horizontal plane will be

3r/2

Engineering Mechanics MCQ with Answers

Related Engineering Mechanics MCQ with Answers

44) In the equation of virtual work, following force is neglected

all of the above

45) 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

zero

46) The resultant of the following three couples 20 kg force, 0.5 m arm, $ ve sense 30 kg force, 1 m arm, - ve sense 40 kg force, 0.25 m arm, + ve sense having arm of 0.5 m will be

20 kg, - ve sense

47) Angle of friction is the

angle between normal reaction and the resultant of normal reaction and the limiting friction

Engineering Mechanics MCQ with Answers