201. Angular momentum is a :
A. Vector (axial)
B. Vector (Polar)
C. Scalar
D. None of these
202. What remains constant when the earth revolves around the sun?
A. Angular momentum
B. Linear momentum
C. Angular kinetic energy
D. Linear kinetic energy
203. A couple produces :
A. Purely linear motion
B. Purely rotational motion
C. Linear and rotational motion
D. Vibratory motion
204. In which case application of angular velocity is useful?
A. When a body is rotating
B. When a body’s velocity follows a straight line.
C. When a body’s velocity follows a straight line.
D. None of these
205. A cyclist bends while taking a turn to :
A. Reduce friction
B. Generate required centripetal force
C. Reduce apparent weight
D. Reduce speed
206. A stone attached to a string is being whirled in a vertical circle. The string is likely to break when the stone is :
A. At the lowest position
B. At the highest position
C. At any point during motion
D. None of the above
207. A cylinder cannot roll on :
A. A rough horizontal plane
B. A smooth horizontal plane
C. A rough inclined plane
D. A smooth inclined plane
208. Rotatory motion of a body is produced by applying a :
A. Couple
B. Impulse of a force
C. Force
D. None of these
209. A 4 KG mass and a 1 KG mass are moving with equivalent energies. The proportion of the extents of their direct momenta is
A. 1:2
B. 1:1
C. 2:1
D. 4:1
210. A Particle reaches its highest point when it has covered exactly one half of its horizontal range. The corresponding point on the displacement time is characterized by :
A. Negative slope and zero curvature
B. Zero slope and negative curvature
C. Zero slope an positive curvature
D. Positive slope and zero curvature
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