2. Sample Papers
  3. NEET

NEET Sample Paper NEET Sample Test Paper-85

  • question_answer
    The motion of particle is described by the equation \[x=a+b{{t}^{2}},\] where \[a=15\,\,cm\] and \[b=3\,\,cm/{{\sec }^{2}}.\] Its instant velocity at time \[3\,\,\sec \] will be

    A) 3 6 cm/sec        

    B)        9 cm/sec

    C) 4.5 cm/sec

    D)                    18 cm/sec

    Correct Answer: D

    Solution :

    [d] \[x=a+b{{t}^{2}}=15+3{{t}^{2}}\] \[v=\frac{dx}{dt}=3\times 2t=6t\] \[\Rightarrow \]\[v{{|}_{t=3s}}=6\times 3=18cm/s\]


You need to login to perform this action.
You will be redirected in 3 sec spinner