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 Kinematics of a Particle True or False

 1 . Dynamics is concerned with bodies that only have accelerated motion.   True  False 2 . A particle has a mass but negligible size and shape.   True  False 3 . Some objects can be considered as particles provided motion of the body is characterized by motion of its mass center and any rotation of the body can be neglected.   True  False 4 . The distance the particle travels is a vector quantity.   True  False 5 . The average velocity of a particle is different than its average speed.   True  False 6 . If the acceleration is zero, the particle cannot move.   True  False 7 . A position vector r acting along a straight axis s, can never change direction.   True  False 8 . A position vector r acting along a straight axis s can change its magnitude and sense of direction.   True  False 9 . Kinematics is concerned with the forces that cause the motion.   True  False 10 . Speed represents the magnitude of velocity.   True  False 11 . Average speed represents the total distance traveled divided by the total time.   True  False 12 . A particle can have an acceleration and yet have zero velocity.   True  False 13 . The equation v = v0 + act can be used when a = (3 t) m/s2.   True  False 14 . For rectilinear kinematics, the direction of v is defined by its algebraic sign.   True  False 15 . For rectilinear kinematics, the positive direction of the coordinate axis can be directed to the left.   True  False 16 . If v = (4 t3) m/s, it is necessary to know the position of the particle at a given instant in order to determine the position of the particle at another instant.   True  False

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