Physics B I for AP -- Lesson 2 Test

[ASnieckus]

It seems to me that option B in question #7 in the Lesson 2 Chapter Test ( http://www.montereyinstitute.org/course ... swers.html ) is incorrectly written.

It should be
θ = 90 - β

Here's the text of the question as display in the answer key:

7. Other than an angle of 45°, when a projectile is launched from the ground at an angle of θ above the horizontal, there is another angle β where if the projectile is launched at the same velocity it will travel the same horizontal distance. θ and β are related by:

a. θ = 2β

*b. β = 90 - β

c. θ = 90 + β

d. β = 2θ

I didn't find any mention of this error in the erratum, so I am bringing it to "your" attention here. Thank you.
Alison Snieckus

[NancyC]

Thank you for bringing this error to our attention. We will have our Subject Matter Experts verify the error and include it in the updated errata.

[maxbucksov]

Nice error found... :D