Homework Statement
A stone is dropped of a cliff. A second stone is thrown down the cliff at 10 m/s at 0.5s after the first stone. When do the stones cross paths?
Homework Equations
Yf = vt + at^2/2
The Attempt at a Solution
My logic is the set the final position Yf equal for both stones...
Yep, got it. I was on the wrong track. . . I would shoot myself in the foot, but instead I may get rid of it altogether!
Thanks for the help and quick replies.
Getting rid of time; the only way I see that is if I substitute t = \frac{x_f}{v_x} , giving us
y_f = x_f tan(\theta) + \frac{1}{2 v_x^2} a_y x_f^2.
Perhaps I do not understand, we do not know y_f , nor x_f .
I tried this but here is what I got: y_f = x_f tan(\phi - \theta) + \frac{1}{2}a_y t^2. Still too many unknowns though, assuming my algebra and logic is correct of course.
Homework Statement
I was tutoring the other day, when we came across a problem that had me stumped!
A person standing on a hill that forms an angle \theta = 30^o wrt to the horizon, throws a stone at {\bf v} = 16 m/s up the hill at an angle \phi = 65^o wrt to the horizon. Find y_f...
Hello, this is probably one of those shoot yourself in the foot type questions.
I am going through Landau & Lifshits CM for fun. On page 7 I do not understand this step:
L' = L(v'^2) = L(v^2 + 2 \vec{v} \cdot \vec{\epsilon} + \epsilon^2)
where v' = v + \epsilon . He then expands the...
Okay, also note that \int \cdots \int f(\vec{x}) \delta(\vec{x} - \vec{x}_o) d^Nx = f(\vec{x}_o). This can allow you to fix some variables.
My next question is, are we integrating from -\infty \rightarrow \infty ? If the variable being integrated is not within the bounds, we can simplify...