A. The body centrode rolls on the space centrode
B. The space centrode rolls on the body centrode
C. Both body and space centrodes may role on each other
D. The body centrode never touches space centrode
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A force P of 50 N and another force Q of unknown magnitude act at 90° to each other. They are balanced by a force of 130 N. The magnitude of Q is__________________?
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If the resultant of two forces has the same magnitude as either of the force, then the angle between the two forces is____________________?
A. 60 N
B. 80 N
C. 100 N
D. 120 N
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The angles between two forces to make their resultant a minimum and a maximum respectively are__________________?
A. 30°
B. 45°
C. 60°
D. 120°
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The resultant of two forces P and Q is R. If Q is doubled, the new resultant is perpendicular to P. Then_________________?
A. 0° and 90°
B. 180° and 90°
C. 90° and 180°
D. 180° and 0°
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A disc of mass 4 kg, radius 0.5m and moment of inertia 3 kg-m2 rolls on a horizontal surface so that its center moves with speed 5 m/see. Kinetic energy of the disc is ___________________?
A. P = R
B. Q = R
C. P = Q
D. None of the above is correct
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The following is in unstable equilibrium__________________?
A. 50 J
B. 150 J
C. 200 J
D. 400 J
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A uniform pyramid and a uniform prism of same height lie with their base on the surface. Which is more stable ?
A. a uniform solid cone resting on a generator on a smooth horizontal plane
B. a uniform solid cone resting on its base on a horizontal plane
C. a solid cube resting on one edge
D. a satellite encircling the earth
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A rigid body is in a stable equilibrium if the application of any force__________________?
A. pyramid
B. prism
C. both equally stable
D. none of the above
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Two circular discs of same weight and thickness are made from metals having different densities. Which disc will have the larger rotational inertia about its central axis ?
A. can raise the CG of the body but can not lower it
B. tends to lower the CG of the body
C. neither raises nor lowers the CG of the body
D. none of above