Question

The x an y coordinates of a particle at any time t is given by x =7t + 4t² and y = 5t, where x and y are in metre and t in seconds. The acceleration of particle at

The x an y coordinates of a particle at any time t is given by ( x=7 t+4 t^{2} ) and ( y=5 t, ) where ( x ) and ( y ) are in metre and ( t ) in seconds. The acceleration of particle at ( t=5 ) s is
(a) zero
(b) ( 8 mathrm{ms}^{-2} )
(c) ( 20 mathrm{ms}^{-2} )
(d) ( 40 mathrm{ms}^{-2} )

NEET/Medical Exams

Physics

Solution

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The x an y coordinates of a particle at any time t is given by x =7t + 4t² and y = 5t, where x and y are in metre and t in seconds. The acceleration of particle at t= 5 s is

The correct option is ( 8 mathrm{ms}^{-2} )