How does the vertical component of a projectile’s motion compare with the motion of vertical free fall when air resistance is negligible?
1. identical to that of free fall
2. greater than that of free fall
3. it cannot be determined.
4. less than that of free fall

1. Identical to that of free fall

Explanation:

As we know that there is same external force acting on an object when it is released in the air which is given as

so here in vertical direction the acceleration is given as

so we will have

so we can say that in vertical direction the acceleration is always same while object is in vertical motion or it is in projectile motion

the pull of gravity on the rocket decreases