PLEASE HELP ON THIS QUESTION

Aray of light traveling parallel to the principal axis of a concave mirror will be reflected through the mirror's

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

Acaterpillar tries to climb straight up a wall a meter high, but for every 2 cm up it climbs, it slides down 1 cm. eventually, it reaches the top. when it reaches the top, it does not pull itself over so it will slide down 1 cm. what is the total displacement traveled?