question_answer

A particle of mass 0.3 kg is subjected to a force \[F=-\text{ }kx\]with\[k=15\text{ }N/m.\]What will be its initial acceleration, if it is released from a point 20 cm away from the origin?     AIEEE  Solved  Paper-2005

A) \[3\text{ }m/{{s}^{2}}\]      

B)       \[15\text{ }m/{{s}^{2}}\]             

C)        \[5\text{ }m/{{s}^{2}}\]            

D)        \[\text{10 }m/{{s}^{2}}\]

Correct Answer: D

Solution :

Given, and As                                            ...(i) and                                  ...(ii)             [from Eqs. (i) and (ii)] or   Initial acceleration