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.Management Sciences
Category: Applied Mechanics and Graphic Statics
Two objects moving with uniform speeds are 5 m apart after 1 second when they move towards each other and are 1 m apart when they move in the same direction. The speeds of the objects are____________________?
0
A. 2 m/sec and 2 m/sec
B. 3 m/sec and 2 m/sec
C. 3 m/sec and 3 m/sec
D. 4 m/sec and 6 m/sec
A heavy ladder resting on floor and against a vertical wall may not be in equilibrium if________________?
A. floor is smooth and wall is rough
B. floor is rough and wall is rough
C. both floor and wall are rough
D. both floor and wall are smooth
The potential energy of a particle falling through a straight shaft drilled through the earth (assumed homogenous and spherical) is proportional to____________________?
A. log r
B. r
C. r2
D. 1/r
where r is the distance of’the particle from centre of the earth
Instantaneous center is at infinity when the angular velocity is _________________?
A. constant
B. zero
C. maximum
D. minimum
A shell of mass 100 kg travelling with a velocity of 10 m/sec breaks into two equal pieces during an explosion which provides an extra kinetic energy of 20000 Joules. If the pieces continue to move in the same direction as before, then the speed of the faster one must be____________________?
A. 20 m/sec
B. 30 m/sec
C. 40 m/sec
D. 50 m/sec
A cylinder will slip on an inclined plane of inclination 0 if the coefficient of static friction between plane and cylinder is_____________________?
A. less than (1/3) tan 0
B. less than (2/3) tan 0
C. less than (1/3) sin 6
D. less than (2/3) sin 6
A uniform pyramid and a uniform prism of same height lie with their base on the surface. Which is more stable ?
A. pyramid
B. prism
C. both equally stable
D. none of the above
A cube on a smooth horizontal surface___________________?
A. cannot be in stable equilibrium
B. cannot be in neutral equilibrium
C. cannot be in unstable equilibrium
D. can be in any of these states
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