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Question

A particle is subjected to two simple harmonic motions along x and y directions according to x=3sin 100πt y=4sin 100πt

A
Motion of particle will be on ellipse travelling in clockwise direction.
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B
Motion of particle will be on a straight line with slope 43
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C
Motion will be simple harmonic motion with amplitude 5.
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D
Phase difference between two motions is π2.
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Solution

The correct option is A Motion of particle will be on ellipse travelling in clockwise direction.
x=3sin100πt

y=4sin100πt

Equation of path is yx=43

ie,. t=43x

which is equation of a straight line having slope 4/3.

Equation of resulting motion is

r=x^i+y^j=(3^i+4^j)sin100πt

Amplitude is 32+42=5

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