- #1
nando94
- 33
- 0
An object is launched from the origin with a velocity of 20 m/s at an angle of 30 degrees above the x axis. The object lands on a roof that is 4 meters high. What is the time when the object hits the roof?
a) 1.11 s
b) 1.27 s
c) 1.33 s
d) 1.49 s
e) 1.67 s
I did 20 (sin(30)) = 10 m/s. Then used the equation
vf = vi + at
0 = 10 - 9.8t
t = 1.02 s
What am I doing wrong.
a) 1.11 s
b) 1.27 s
c) 1.33 s
d) 1.49 s
e) 1.67 s
I did 20 (sin(30)) = 10 m/s. Then used the equation
vf = vi + at
0 = 10 - 9.8t
t = 1.02 s
What am I doing wrong.