Question

2. Consider a projectile launched near the surface of the earth . Which of the following is
true?
a. The vertical component of its velocity is constant
b. The horizontal component of its velocity is increasing
c. The vertical component of its acceleration is increasing
d. The horizontal component of its acceleration is increasing
e. The horizontal component of its velocity is constant

Answer 1

Consider this, as the projectile leaves the launcher (looking at each axis individually) along the y axis the projectile rises and falls being accelerated by gravity in both a positive and negative direction. Along the x axis you have no component to accelerate the projectile in either the + or -. Thus the true statement is that the horizontal component remains constant.