Friday's Lesson and #41-47 odd on the hw
Could someone summarize the gist of anything new you did on Friday?
Also, I don't really get how to do the section in the homework with 41-47.
Thanks
Also, I don't really get how to do the section in the homework with 41-47.
Thanks
posted by Carrie Desmond at 1:05 PM
1 Comments:
The thing to remember is to refer to the initial velocities as triangle trig, w/ Vo as the hyp, Vox as the x value (cos), and Voy as the y-value (sin). the equations are
Vox = Vo*cos(theta)
Voy = Vo*sin(theta)
Theta is always the angle at which the object is shot, as in 41-47.
Usually, when the problem refers to initial V, that is Vo, the hypotenuse.
The last two equations are the key to getting the answer
Y = Yo + Voy*t - 16t^2
X = Xo + Vox*t
Here, plug in what the previous equations give you.
Triangle trig is key in these problems.
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