# Kinematics- Velocity at Origin

**Classical Mechanics**Level 3

A particle moves in a the place \(x\)-\(y\) with constant acceleration a directed along the negative \(y\)-axis. The equation of motion of the particle has the form
\(y=px-q{ x }^{ 2 }\)
where \(p\) and \(q\) are positive constants. Then the velocity of the particle at the origin is?