question_answer

The x and y coordinates of a particle at anytime t are given by \[{{m}^{2}}/{{s}^{2}}\]and\[{{m}^{2}}/{{s}^{2}}\],where x and y are in metre and t is insecond. The acceleration of the particle att = 5 s is

A)  zero                     

B)  8 m/\[{{m}^{2}}/{{s}^{2}}\]

C)  20 m/\[\frac{mgR\sin \theta }{{{B}^{2}}{{l}^{2}}}\]                         

D)  40 m/\[\frac{mgR\sin \theta }{B{{l}^{3}}}\]