Question # 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

# 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} )

Solution

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