Question

A golf ball is hit with an initial velocity of 15 meters per second at an angle of 35 degrees above the horizontal. What is the vertical component of the golf ball's initial velocity?
a)8.6 m/s
b)9.8 m/s
c)12 m/s
d)15 m/s
I know you use 15cos 35 feta to solve the question but whenever i plug that into my calculator i get -13.553 The answer that my class got was 8.6m/s. How do you calculate it using a graphic calculator with getting a negative number?

Answer 1

Vo = 15m/s[35o]
Yo = 15*sin35 = 8.60 m/s.

Answer 2

Ay= (A)(cos theta)
Ay= (15 m/s)(cos 55 degrees)
Ay= 8.6 m/s