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_ A distance is always, , . A displacement, , - In five minutes the distance between a p, , CONCISE PHYSICS> IX, , . A distance, , (a) Shortest length between two points, (a) Is always positive., , (b) Path cov ered by an object between two points, (b) Is always negative., , (c) Product of length and time. (c) May be positive as well as negative., (d) None of the above, (d) Is neither positive nor negative., , (a) Is al positiv intervals of time, its motion is said to be, a) Is always positive,, , (a) Non-uniform (b) Uniform, pp) 1s always aa (c) Accelerated (d) Back and forth, (c) May be positive as well as negative. 16, The motion along a straight line is called, (d) Is neither positive nor negative, (a) Vibratory (b) Stationary, Examples of vector quantities are (c) Circular (d) Linear, (a) Velocity, length and mass, 17, A particle is travelling with a constant speed. This, , means that, , (b) Speed, length and mass,, (a) Its position remains constant as time passes., , (c) Time, displacement and mass., , (d) Velocity, displacement and acceleration. time., . Which of the following is not characteristic of (c) Its acceleration is zero., displacement? (d) It does not change its direction of motion., (a) It is not always positive. 18. The rate of change of displacement is, (b) It has both magnitude and direction. (a) Speed (b) Velocity, (c) It can be zero. (c) Acceleration (d) Retardation, (d) Its magnitude is less than or equal to the actual _-19. Speed is never, path length of the object. (a) Zero (b) Fraction, - The S.I. unit of displacement is (c) Negative (d) Positive, (a)m (b)ms? 20. The motion of a body covering different distances, « Sh in the same intervals of time is said to be, (c)ms? (d) None of these (a) Zig - Zag () ?, - Which of the following is not a vector? () eee " (d) Variable, (2) Speed (b) Velocity 21, The unit of velocity is ns, (c) Displacement (d) Acceleration (a) ms 7 ne a (b) m st, - Time is an example of (c) ms? ibe gp (a) none of these, (2) Scalar 22, ARE pete pein « ts, , , , , , , , , , (b) Vector, (c) Scalar or vector, (d) Neither scalar nor vector, , changes progressively, What is: true, , (a) Car js at rest., , (b), , () “othing can be said wit vith this informane’ ea he steal oves along a stra el t line., (4) None of the above, a, , =, , Car is in motion,, , , , , , 15, When a body covers equal distance in equal, , (b) It covers equal distance in equal interval of