A particle is moving in x−y plane whose x and y−coordinates are x=3sint2πt and y=2cos2πt, where x and y are in meter and t is in second.
A
The path of the particle is elliptical
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B
The path of the particle is circular
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C
The path of the particle is straight line
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D
The path of the particle is parabolic
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Solution
The correct option is A The path of the particle is elliptical Given, x=3sin2πt ⇒sin2πt=x3…(i) y=2cos2πt ⇒cos2πt=y2…(ii)
Squaring and adding (i) and (ii), sin22πt+cos22πt=(x3)2+(y2)2 1=x29+y24
It is an equation of ellipse.
Final Answer: (A)