Question

: An object of mass m slides on a plane inclined at an angle  with the horizontal [as
shown in the Fig-1]. The coefficient of friction between the object and the plane is  . The
object starts sliding at some non-zero angle with the X-axis and its position vector at time t is
given as ˆ ˆ r t x t i y t j ( ) (










Obtain the equation of the trajectory of the object