- #1
hanlon
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Homework Statement
A projectile is shot from the edge of a cliff 115 above ground level with an initial speed of 65.0 at an angle of 35.0 with the horizontal, as shown in the figure .
At the instant just before the projectile hits point P, determine the horizontal and the vertical components of its velocity.
Enter your answers numerically separated by a comma.
Homework Equations
basic kinematic equations [a= constant]
The Attempt at a Solution
My attempt was pretty basic, I thought it was correct, and even asked my brother whos a physics tutor for help and he got the same answer, though the MasteringPhysics site which my class is using says its wrongthe horizontal x direction I got the same speed as it is when shot from the start so it doesn't change
65m/s*cos(35o) = 53.2 m/s in the horizontal direction
for the vertical I used the equation
v = vo + at
where vo = 65m/s*sin(35o) = 37.3 m/s
a = 9.8 m/s2
t = 2.4 s
"t" I found in a different part of the question.
so "v" = 60.36 m/s
though the site says its wrong (masteringphysics)
Thanks.