Relative speed: Horizontal distance travelled in a collision

physicsfun

Given coefficient of kinetic friction is zero and the coefficient of restitution is e:

A particle of mass m, collides at an angle (theta), with speed v, onto an infinite mass horizontal surface.
Collision time is 0.2 seconds.

What is the horizontal distance travelled by the particle during the collision?

Doc Al

Since no horizontal force acts on the particle, the horizontal component of its velocity remains constant.

physicsfun

Doc, thanks for your reply!!
so, and since it's just horizontal velocity... we just have to take into account the horizontal initial component and the vertical and coefficient of restitution are irrelevant in this case then?

Doc Al

That's what I would say.