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11 . The bodies which rebound after impact are called
A. inelastic bodies
B. elastic bodies
C. neither elastic nor inelastic bodies
D. none of these

12 . The maximum frictional force, which comes into play, when a body just begins to slide over the surface of the other body, is known as
A. static friction
B. dynamic friction
C. limiting friction
D. coefficient of friction

13 . The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. This is known as
A. principle of independence of forces
B. principle of resolution of forces
C. principle of transmissibility of forces
D. none of these

14 . The angle between two forces when the resultant is maximum and minimum respectively are
A. 0° and 180°
B. 180° and 0°
C.
90° and 180°
D. 90° and 0°

15 . When a rigid body is suspended vertically, and it oscillates with a small amplitude under the action of the force of gravity, the body is known as
A. simple pendulum
B. compound pendulum
C. torsional pendulum
D. second's pendulum




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