Hi ,Can anyone help me to find the right code for Throwing a ball

2. Throwing a ball Below are all the steps you need to follow, but you should also add your own meaningful comments to the code as you write it. 1) 2) Start a new file in the MATLAB Editor and save it as CTask1p2.m At the top of the file, define some constants (you can pick your own variable names) i. Initial height of ball at release 1.5 rm ii. Gravitational acceleration 9.8 m/s ii. Velocity of ball at release 4 m/s iv. Angle of the velocity vector at time of release Next, make a time vector that has 1000 linearly spaced values between 0 and 1, inclusive Ifx is distance and y is height, the equations below describe their dependence on time and all the other parameters (initial height h, gravitational acceleration g, initial ball velocity v, angle of velocity vector in degrees 0). See the following illustration 45 degrees 3) 4) Solve for x and y i. x(1)-vcos(JT-)l , we multiply ? by ?/180 to convert degrees to radians 180 180 5) Approximate when the ball hits the ground i. Find the index when the height first becomes negative (use find) ii. The distance at which the ball hits the ground is value of x at that index iii. Display the words: The ball hits the ground at a distance of X meters. (where X is the distance you found in part ii above) 6) Plot the ball's trajectory i. Open a new figure (use figure) ii. Plot the ball's height on the y axis and the distance on the x axis (plot) ii Label the axes meaningfully and give the figure a title (use xlabel, ylabel, and title) Hold on to the figure (use hold on) Plot the ground as a dashed black line. This should be a horizontal line going from 0 to the maximum value of x (use max). The height of this line should be 0. (see help plot for line colors and styles) iv. v.

[A M Saif Ben Kabir Amit]

I jsut got this one but its not correct,

h=1.8
g=9.8
v=4
theta=45
t=0:1:1000
x=v*cos(theta*(pi/180))*t
y=h+v*sin(theta*(pi/180))*t-0.5*g*t.^2
k=find(y<-0)
figure
plot(x,y)
title('Ball trajectory')
xlabel('Distance(m)')
ylabel('Ball Height(m)')
hold on

[Bjorn Gustavsson]

Run your code line-by-line and investigate the results after each line. That way you will find what your errors are.

HTH

[A M Saif Ben Kabir Amit]

Thank You So Much

[darova]

I voted for your answer so you have more attention

I think someone should help you. There are people here who work here (and get paid)

Answer 1

[Bjorn Gustavsson]

Check the values of t...

HTH

[Bjorn Gustavsson]

After you've fixed that glaring typo (welcome to programming, you'll have much fun to look forward to, confusing 1 I and l, O and 0, and many other rage-inducing face-into-brickwall experiences) you could add some additional decorations, such as:

plot(x(k(1)),y(k(1)),'r.')
plot(x(k(1)-1),y(k(1)-1),'c.')
grid on