is it something like 0=vsin30*t+0.5(9.81)t2?
or do you put vsin30 into the v=vi+at and get v=vsin30+9.81t?
i know i should be able to do this and when I realize how to do it I'll probably feel pretty dumb for not understanding!
you're trying to prove the distance
and yeah well those were just the variables that were given to us but you're right it would be a lot easier to use a and b or something
any idea on how to solve?
basically the question he gave us is:
A cannon ball is fired from an angle o with an...
I'm confused as to where the 100m or 15m/s comes in??
and once you have the horizontal equation and vertical equation what do you do?do you need to solve for time first? I'm sorry it's just we were never taught this so I am pretty much clueless!
Homework Statement
So you basically have to prove this big long equation d=2v2cos(o)sin(O+o)/gcos(O)
Homework Equations
sin(O+o)=sin(O)cos(o)+sin(o)cos(O)
The Attempt at a Solution
so i have weeded it down to this...
Okay I Think I sort of understand what you are trying to say. If you put d=vt are you supposed to put in 100=15*t and solve or just set t=d/15 ?
and when you put 0 in for your vertical component i understand that but you get 0=vi(d/15)+.5(9.81)(d/15)2 then what are you supposed to solve for...
Homework Statement
You are a hunter who enjkoys shooting wild game with a bow. A moose, 100.0m away is charging with a velocity of 15 m/s toward the hunter. The hunter fires the bow at an angle of 30.0 degrees from the ground. What velocity must the arrow be fired at in order to hit the...
A cannon ball is fired from an angle o with an intial velocity of v. The hill sklopes down with an angle of O. Prove that the horizontal distance the cannon ball travels is given by dx= 2v2cos(o)sin(O+o)/gcos(O)
2. Equations
sin(O+o)=sin(O)cos(o)+sin(o)cos(O)
d=1/2gt2
The Attempt...