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A particle starting from rest has a constant acceleration of `4 m//s^2` for 4 s. It then retards uniformly for next 8 s and comes to rest. Find during the motion of particle (a) average acceleration (b) average speed and (c) average velocity.A. `4 m//s^2`B. zeroC. `8 m//s^2`D. `- 4 m//s^2` |
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Answer» Correct Answer - B Average acceleration is zero, because change in velocity is zero. |
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