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Give examples where a. the velocity of a particle is zero buts its acceleration is not zero. b.the velocity is opposite in direction to the acceleration, c. the velocity is perpendicular to the acceleration. |
Answer» (i) A particle thrown upwards has its velocity in opposite direction to its acceleration (g, dowanwards). (ii) When the particle is released from rest from a certain height, its velocity is zero, while acceleration is g acting pendulum velocity is zero, while acceleration is not zero. (iii) In uniform circular motion velocity is perpendicular to its radial or centripetal acceleration. |
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