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.Management Sciences
Category: Engineering Mechanics
The unit of force in S.I. units is________________?
A. kilogram
B. newton
C. watt
D. dyne
E. joule
The unit of work or energy in S.I. units is_______________?
A. newton
B. pascal
C. kilogram meter
D. watt
E. joule
Pick up the incorrect statement from the following ?
A. The C.G. of a circle is at its center
B. The C.G. of a triangle is at the intersection of its medians
C. The C.G. of a rectangle is at the inter-section of its diagonals
D. The C.G. of a semicircle is at a distance of r/2 from the center
E. The C-G. of an ellipse is at its center
Which one of the following statements is not correct_________________?
A. the tangent of the angle of friction is equal to coefficient of friction
B. the angle of repose is equal to angle of friction
C. the tangent of the angle of repose is equal to coefficient of friction
D. the sine of the angle of repose is equal to coefficient to friction
E. none of the above
The weight of a body is due to ___________________?
A. centripetal force of earth
B. gravitational pull exerted by the earth
C. forces experienced by body in atmosphere
D. force of attraction experienced by particles
E. gravitational force of attraction towards the center of the earth
Which of the following do not have identical dimensions ?
A. Momentum and impulse
B. Torque and energy
C. Torque and work
D. Kinetic energy and potential energy
E. Moment of a force and angular momentum
A semi-circular disc rests on a horizontal surface with its top flat surface horizontal and circular portion touching down. The coefficient of friction between semi-cricular disc and horizontal surface is i. This disc is to be pulled by a horizontal force applied at one edge and it always remains horizontal. When the disc is about to start moving, its top horizontal force will____________________?
A. remain horizontal
B. slant up towards direction of pull
C. slant down towards direction of pull
D. unpredictable
E. none of the above
According to Lami’s theorem___________________?
A. three forces acting at a point will be in equilibrium
B. three forces acting at a point can be represented by a triangle, each side being proportional to force
C. if three forces acting upon a particle are represented in magnitude and
direction by the sides of a triangle, taken in order, they will be in equilibrium
D. if three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two
E. none of the above
A body moves, from rest with a constant acceleration of 5 m per sec. The distance covered in 5 sec is most nearly_________________?
A. 38 m
B. 62.5 m
C. 96 m
D. 124 m
E. 240 m
When trying to turn a key into a lock, following is applied _____________________?
A. coplanar force
B. non-coplanar forces
C. lever
D. moment
E. couple
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