Author Question: For a projectile launched horizontally, the vertical component of a projectile's velocity A) is ... (Read 638 times)

JMatthes · **on:** Jul 27, 2018

For a projectile launched horizontally, the vertical component of a projectile's velocity

A) is zero.
B) remains a non-zero constant.
C) continuously increases.
D) continuously decreases.
E) any of the above, depending on position.

Question 2

Can an object's velocity change direction when its acceleration is constant?

A) Yes, this is possible, and a rock thrown straight up is an example.
B) No, this is not possible because it is always speeding up.
C) No, this is not possible because it is always slowing up.
D) Yes, this is possible, and a car that starts from rest, speeds up, slows to a stop, and then backs up is an example.
E) No, this is not possible because it is always speeding up or always slowing down, but it can never turn around.