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Applied Mechanics and Graphic Statics - Interview Questions and Answers

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56. A circular disc rotates at n rpm. The angular velocity of a circular ring of same mass and radius as the disc and to have the same angular momentum is
A. n rpm
B. n/2 rpm
C. n/4 rpm
D. 2n rpm
Explanation:
57. Select the correct statement
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.
Explanation:
58. A disc of mass 4 kg, radius 0.5m and moment of inertia 3 kg-m2 rolls on a horizontal surface so that its centre moves with speed 5 m/see. Kinetic energy of the disc is
A. 50 J
B. 150 J
C. 200 J
D. 400 J
Explanation:
59. If a projectile is fired with an initial velocity of 10 m/sec at an angle of 60� to the horizontal, its horizontal and vertical velocity at the highest point of trajectory are
A. 0 and 5 m/sec
B. 5 m/sec and 0
C. 5 V3 m/sec and 0
D. 5 and 5V3 m/sec
Explanation:
60. The angle of projection at which the horizontal range and maximum height of a projectile are equal to
A. 45�
B. tan-1 (2)
C. tan-' (4)
D. tan"1 (1/4)
Explanation: