JEE Advanced Model Paper 3 with solutions for online practice

Particle P will have a velocity in vertical direction, when
Rωcosα = v
⇒ α = cos−1(

v

Rω

)
So, the required angle θ is θ = π - cos−1(

v

Rω

)
And θ = π + cos−1(

v

Rω

)
Point P corresponds to θ = π - cos−1(

v

Rω

) and it has velocity in vertically
upward direction, while Q corresponds to θ = π + cos−1(

v

Rω

) and it hasvelocity in vertically downward direction.