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The potential energy U in joule of a par...

The potential energy `U` in joule of a particle of mass `1 kg` moving in `x-y` plane obeys the law`U = 3x + 4y`, where `(x,y)` are the co-ordinates of the particle in metre. If the particle is at rest at `(6,4)` at time `t = 0` then :

A

its acceleration is of magnitude `5m//s^(2)`

B

Its velocity when it crosses the y axis is `10 m//s`

C

it crosses the y - axis (x=0) at `y=-4`

D

It moves in a straight line passing through the origin (0,0)

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A, B, C
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