Q.1:
A rod AB carries three loads of 30 N, 70 N and 100 N at distances of 20 mm, 90 mm and 150 mm respectively from A. Neglecting the weight of the rod, the point at which the rod will balance is_______________?
A.109.5 mm from A
B.
119.5 mm from A
C.
125.5 mm from A
D.
132.5 mm from A
Q.2:
When two forces, each equal to P, act at 90 to each other, then the resultant will be_____________?e
A.
P
B.PV2
C.
P/V2
D.
2P
Q.3:
A cube on a smooth horizontal surface___________________?9
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
Q.4:
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
B.2 m x 3 m
C.
1 m x 3m
D.
equally stable on all faces
Q.5:
Minimum potential energy of a system will be in the position of________________?P
A.stable equilibrium
B.
unstable equilibrium
C.
neutral equilibrium
D.
all of the above
Q.6:
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_________________?
A.
64 J
B.
400 J
C.464 J
D.
89 J
Q.7:
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______________?
A.
2 J
B.4 J
C.
6 J
D.
8 J
Q.8:
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
Q.9:
Rate of change of angular momentum is equal to_______________?>
A.
force
B.torque
C.
linear momentum
D.
impulse
Q.10:
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___________________?