Laws of MotionMedium
Question
A particle is moving along the circle x2 + y2 = a2 In anticlockwise direction. The x-y plane is a rough is horizontal stationary surface. At the point (a cos θ, a sin θ), the unit vector in the direction on the particle is
Options
A.cos θî + sin θĵ
B.- (cos θî + sin θĵ)
C.sin θî - cos θĵ
D.cos θî - sin θĵ
Solution
= cos (θ + 270) Î + sin (θ + 270o)
= sin θî - cos θĵ
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