I need to see if there is a different method form the one found here is chegg for this question.

A free falling rock is released at an altitude of 50 m. Earth's gravity g = 9.81 m/s^2 is the only force acting upon the rock. (i.e. no atmospheric drag). Using MATLAB, plot the altitude, velocity, and acceleration as a function of time (4 seconds in 0.05 second steps) in one figure using the "subplot" function. In a second figure plot the velocity as a function of the altitude.