Can someone help me get started on my code?

The equations of motion can be combined algebraically to yield an equation to determine the height of the ball, y , as a function of x and the initial conditions of the ball's release (height, h, initial speed v0 and the angle of release θ) :

The parameter g = 32.2 ft/s^2 is the acceleration due to gravity. Write a "quarterback calculator" function that outputs the required angle(s) of release given an input vector of one or more throwing velocities (initial speeds) and the location ( x , y) of the target down field. The function should accept the following inputs (in order): 1.A vector of one or more throwing velocities ( v0 ) in feet/second 2.The height of release ( h ) in feet 3.The distance down field to the receiver ( x ) in feet 4.The height of the target catch ( y ) in feet 5.An initial guess for the numerical solution of θ in degrees 6.A stopping criterion for the numerical solution

Your function should use fzero along with the input numerical guess and stopping criterion to solve for the angle of release ( θ ) corresponding to each value in the input vector of release velocities. Your function should have two outputs (in order): 1.A column vector of release angles ( θ ) in degrees corresponding to each value in the input vector of initial speeds. 2.A column vector of residual values associated with the numerical solution for each release angle.

Answer 1

[Image Analyst]

http://www.mathworks.com/matlabcentral/answers/8626-how-do-i-get-help-on-homework-questions-on-matlab-answers

Hint:

Make a vector t with times that the ball will be in the air, with the last number being the longest you might ever expect it to be in the air:

t = 0 : 0.1 : 15

Then get your equation for height:

h = some function of t and your other variables.

Then plot it

plot(t, h, 'b*-', 'LineWidth', 2, 'MarkerSize', 13);
grid on;
xlabel('time', 'FontSize', 15);
ylabel('height', 'FontSize', 15);

Of course find out when it hits the ground (h=0) using fzero like it asked you to. Post your code if you need further help.

[Troy Potensky]

We do not need to plot this function. We only need to use fzero in the function to find roots (I assume h=0) is what we are trying to find. But it is included as an input to the function so I am going to assume it is where y=0. how can I implement a for loop into this to help get out a column vector of angles (as stated in output section)?

[Image Analyst]

You need to use fzero to solve for alpha given x, y, v0, and h.