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A particle is moving with velocity vecv=...

A particle is moving with velocity `vecv=K(y hat i+x hat j),` where K is a constant. The general equation for its path is

A

quantity `vec v xx vec a` is constant in time

B

`vec F` arises due to a magnetic field

C

kinetic energy of particle is constant in time

D

quantity `vec v. vec a` is constant in time

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