A skier leaves a ski jump with a horizontal velocity (and no vertical velocity component).If the magnitude of the horizontal component of her velocity the instant before she lands two seconds later is 15.0 m/s,what was the horizontal component of her initial velocity
A)24.0 m/s.
B)19.6 m/s.
C)15.0 m/s.
D)43.6 m/s.
E)0 m/s.

Question

Quizplus · Accepted Answer

In the absence of horizontal forces (assuming air resistance is negligible), the horizontal component of velocity remains constant throughout the flight. Therefore, if the skier's horizontal velocity is 15.0 m/s just before landing, it was also 15.0 m/s upon leaving the ski jump.

A Skier Leaves a Ski Jump with a Horizontal Velocity