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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

theparticlehasconstantacceleration.

B

theworkdonebytheexternalforces,fromthepositionofrestoftheparticleandtheinstantoftheparticlecrossingxaxisis25J.

C

thespeedoftheparticlewhenitcrossestheyaxisis10m/s.

D

thecoordinatesoftheparticleattime`t=4`sare(-18,-28).

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The correct Answer is:
A, B, C, D
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