Projectile Motion: Understanding Vertical and Horizontal Acceleration

[ENCJ]

Homework Statement

A projectile is fired at some angle theta to the horizontal with some initial speed vi, and air resistance is neglected. Which statements about the projectile are true? (Select all that apply.)

1.The projectile is a freely falling body.
2.Vertical acceleration is 9.8 m/s2, downward.
3.Vertical acceleration is 9.8 m/s2, upward.
4.Vertical acceleration depends on theta.
5.Horizontal acceleration is zero.
6.Horizontal acceleration depends on vi.
7.Horizontal acceleration depends on theta

Homework Equations

Vxi=vi*cos(theta)

The Attempt at a Solution

1.The projectile is a freely falling body.
2.Vertical acceleration is 9.8 m/s2, downward.
6.Horizontal acceleration depends on vi.
7.Horizontal acceleration depends on theta

 

[willem2]

6.Horizontal acceleration depends on vi.

why do you think this is true?

 

[Anden]

Most is correct, however I think you should more on what kind of acceleration affects horizontal movement if air resistance is neglected. There are 4 correct alternatives though.