Speed = distance ÷ time.
1864/42=44.38
The two plates grab onto each other and lock in place is not a resulting situation of two plates colliding at a convergent boundary. When two plates colliding at a convergent boundary, what happenes is that one of the boundary either goes under or on top of the under, in order to release the energy that the two have stored because of the collision.
The particles in a hot pan have greater kinetic energy than the particles in a cool oven mitt.
This is because as the temperature of an object increases, the particles gain more energy and therefore move faster, increasing kinetic energy.
I hope this helps, feel free to ask any questions you may have