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The x and y coordination of the particle...

The x and y coordination of the particle at any time are `x=5t - 2t^2`and y =10 t respectively , where x and y are in metres and t in seconds . The acceleration of the particle at t=2s is:

A

`5m//s^2`

B

`-4m//s^2`

C

`-8m//s^2`

D

0

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