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A particle moves in xy plane such that v...

A particle moves in xy plane such that `v_(x)=50-16 t` and `y=100-4t^(2)` where `v_(x)` is in m/s and y is in m. It is also known that `x=0` when `t=0`. Determine (i) Acceleration of particle (ii) Velocity of particle when `y=0`.

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The correct Answer is:
(i) `vec(a)=(-16hat(i)-8hat(j)) m//s^(2)` (ii) `vec(v)=(-30hat(i)-40hat(j)) m//s`
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