Why isn't my find command working? (Matlab HW help!)?
h = 1.5;
g = 9.8.^2;
v = 4;
angle = 45;
t = linspace(0,1,1000);
x = v*cosd(angle)*t; %x - function
y = h + v*sind(angle)*t - 1/2*g*t.^2; % height function
distance1 = find(y < 0) %finds value where y is less than zero.
I can't get the distance1 variable to produce 1 value that represents where y is less than zero. I don't want ALL the values, just the first one.
My professor is also asking me to plot the ground with dashed lines..
Here is what she's asking:
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).
And here is the question in its entirety: (all the superficial stuff, I can do on my own such as x-label, y-label, etc.)
Problem5: Throwing a ball.
a. Start a new file in the Matlab Editor and save it as BallThrow.m
b. At the top of the file, define some constants
i. Initial height of ball at release = 1.5 m
ii. Gravitational acceleration = 9.8 m/s
iii. Velocity of ball at release = 4 m/s
iv. Angle of the velocity vector at time of release = 45 degrees
c. Next, make a time vector that has 1000 linearly spaced values between 0 and 1, inclusive.
d. If x 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
- KeplJoeyLv 79 years agoFavorite Answer
Why are you squaring the 9.8? The units for acceleration is m/s^2, but the number itself is 9.8, not 9.8^2.