1.

The motion of a particle is described by the equation \[x=a+b{{t}^{2}}\] where \[a=15\] cm and \[b=3\] cm/s2. Its instantaneous velocity at time 3 sec will be [AMU (Med.) 2000]

A.             36 cm/sec       
B.             18 cm/sec
C.             16 cm/sec       
D.             32 cm/sec
Answer» C.             16 cm/sec       


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