Hi, I'm currently doing a question from a passage on Uworld qbank and I need help understanding why my method doesn't work? I'm sure I'm missing something. The question (doesn't really apply to the passage) states:
"In one experimental trial, the projectile was uniformly accelerated from rest to a distance of 2 m in 0.1 s. What was the acceleration of the projectile?"
Answer: 400 m/s^2
My answer: 200 m/s^2.
Using the distance (2 m) and time (0.1 s) given, I got the velocity (20 m/s) and I used the equation of velocity divided by time to find the acceleration (20 m/s / 0.1 s), which is how I got 200 m/s^2 but it's wrong. The qbank got 400 m/s^2 by using the kinematic formula: d = v0t + 1/2at^2. Upon reading their calculations, I understand how they got 400 m/s^2 but I'm just wondering why the equation I used (a=v/t) can't work? Is it because it's only used for non-constant/non-uniform acceleration only? Or only used for average acceleration only?
Sorry for the dumb questions. I just wanted to clarify! Every time I think I understand something, I realize I don't lol
"In one experimental trial, the projectile was uniformly accelerated from rest to a distance of 2 m in 0.1 s. What was the acceleration of the projectile?"
Answer: 400 m/s^2
My answer: 200 m/s^2.
Using the distance (2 m) and time (0.1 s) given, I got the velocity (20 m/s) and I used the equation of velocity divided by time to find the acceleration (20 m/s / 0.1 s), which is how I got 200 m/s^2 but it's wrong. The qbank got 400 m/s^2 by using the kinematic formula: d = v0t + 1/2at^2. Upon reading their calculations, I understand how they got 400 m/s^2 but I'm just wondering why the equation I used (a=v/t) can't work? Is it because it's only used for non-constant/non-uniform acceleration only? Or only used for average acceleration only?
Sorry for the dumb questions. I just wanted to clarify! Every time I think I understand something, I realize I don't lol
