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Question

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

A
y2=x2+ contant
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B
y=x2+ contant
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C
y2=x+ contant
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D
xy= contant
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Solution

The correct option is A y2=x2+ contant
Asv=k(yi+xi)
v=Kysodxdt=Ky
vy=Kxsodydt=Kx
dividing both equations
dydx=dydtdividedxdt=KxKy=xy
ydy=xdx
integrating the equation
y22=x22+c


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