The coordinates of a particle moving in a plane are given by x ( t ) = a cos( pt ) and y…

Physics · JEE Advanced · NTA ExamsKinematics

The coordinates of a particle moving in a plane are given by x(t) = a cos(pt) and y(t) = b sin(pt) where a, b (< a) and p are positive constants of appropriate dimensions. Then
  1. the path of the particle is an ellipse
  2. the velocity and acceleration of the particle are normal to each other at t = p/(2p)
  3. the acceleration of the particle is always directed towards a focus
  4. the distance travelled by the particle in time interval t = 0 to t = p/(2p) is a.

Answer

(A) the path of the particle is an ellipse

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