A. Speed
B. Momentum
C. Velocity
D. Energy
82. The
weight of a 10 kg block is
A. 98 N
B. 9.8 N
C. 10 N
D. 0.98 N
83. Let a
disc, a cylinder, a solid sphere, and a ring be rolled down in an inclined
plane simultaneously.
Which will reach first?
A. Disc
B. Cylinder
C. Solid sphere
D. Ring
84. Which
kind of storage device can be carried around?
A. Floppy disk
B. Hard disk
C. System cabinet
D. Hard disk derive
85. Forces
of 3N, 4N and 12N act at a point in mutually perpendicular direction. The magnitude
of the resultant force in newton is
A. 13
B. 11
C. 5
D. Indeterminate from the information given
86. Which of
the following is not necessary for work to be done?
A. An applied force
B. A force component along the displacement
C. A displacement
D. A constant speed
87. A fixed
pulley is employed to
A. Do more work with the same force but without
using pulley
B. Change the direction of force
C. Same work
D. Have mechanical advantage greater than one
88. The
static friction is
A. Always greater than the dynamic friction
B. Always less than the dynamic friction
C. Equal to the dynamic fiction
D. Sometimes greater and sometimes less than the dynamic friction
89. Which is
the suitable method to decrease friction?
A. Polishing
B. Ball and roller bearings
C. Lubrication
D. All of the above
90. The
force of friction that comes into action after the motion has started is known
as
A. Dynamic friction
B. Static friction
C. Friction only
D. Limiting friction
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