The position of a particle with respect to time t along the x-axis is given by 9t2 – t3 where x is in metre and t in second. What will be the position of this particle when it achieves maximum speed along the +x direction? 1. 32 m 2. 54 m 3. 81 m 4. 24 m

   Question:  From NCERT  | NEET 2007   || [Difficult level:Medium]  || 

The position of a particle with respect to time t along the x-axis is given by 9t2 – t3 where x is in metre and t in second. What will be the position of this particle when it achieves maximum speed along the +x direction?

1. 32 m

2. 54 m

3. 81 m

4. 24 m_

:2. 54 m 

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xi physics , page number 45

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