Civil Engineering MCQs

Page No. 166

The ratio of the speed of a rolling cylinder to the speed of sliding cylinder is_______________?


a less than 1


bequal to 1


cbetween 1 and 2


d greater than 2


View Answer less than 1

A flywheel of moment of inertia 20 kg-m” is acted upon by a tangential force of 5 N at 2 m from its axis, for 3 seconds. The increase in angular velocity in radian persecond is__________________?


a1/2


b3/2


c 2


d 3


View Answer 3/2

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___________________?


an rpm


bn/2 rpm


cn/4 rpm


d2n rpm


View Answer n/2 rpm

Rate of change of angular momentum is equal to_______________?


aforce


btorque


c linear momentum


dimpulse


View Answer torque

A solid sphere of mass M and radius R rolls down a plane inclined at 0 with the horizontal. The acceleration of sphere is_______________?


a (1/3) g sin0


b(2/5) g sin 0


c(3/7) g sin 0


d(5/7) g sin0


View Answer (5/7) g sin0

A hoop of radius 3 m weighs 100 kg. It rolls along a horizontal floor so that at its centre of mass has a speed of 200 mm/sec, . The work required to stop the hoop is______________?


a2 J


b4 J


c6 J


d 8 J


View Answer 4 J

The total kinetic energy of a hoop of mass 2 kg and radius 4 m sliding with linear velocity 8 m/sec and angular velocity 5 radian/sec is_________________?


a64 J


b400 J


c464 J


d 89 J


View Answer 464 J

Minimum potential energy of a system will be in the position of________________?


astable equilibrium


bunstable equilibrium


cneutral equilibrium


dall of the above


View Answer stable equilibrium

A block in the shape of a parallelopiped of sides lm x 2m x 3m lies on the surface. Which of the faces gives maximum stable block ?


a 1 m x 2 m


b2 m x 3 m


c1 m x 3m


dequally stable on all faces


View Answer 2 m x 3 m

A cube on a smooth horizontal surface___________________?


acannot be in stable equilibrium


bcannot be in neutral equilibrium


c cannot be in unstable equilibrium


dcan be in any of these states



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