A particle is moving in the x-y plane. At certain instant of time, the components of its velocity...

A particle is moving in the x-y plane. At certain instant of time, the components of its velocity and acceleration are as follows: v_x=3  ms^-1, v_y=4  m s^-1, a_x=2  ms^-2 and a_y=1  m s^-2. The rate of change of speed at this moment is
(1) √(10) m s^-2
(2) 4  m s^-2
(3) √(5) ms^-2
(4) 2  ms^-2

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