Define init-speed and init-angle as program variables. use an initial speed of 1 and an initial angle of pi/4 to start. once your program is running, you should try using different values to see how your animation behaves. note here that we are using an angle specified in radians. since only the initial speed will be specified, you will need to calculate the x and y components of the initial velocity. these may be calculated via init-x-vel = init-speed * cos(init-angle) init-y-vel = init-speed * sin(init-angle)
exercise 2 define the initial horizontal velocity init-x-vel and the initial vertical velocity init-y-vel using the initial speed init-speed and the initial angle init-angle. we define the initial speed and velocity components (horizontal and vertical) as numbers rather than functions because they do not change over time. the rocket experiences a gravitational acceleration in the vertical direction. therefore, the vertical position of the rocket is this function of the time t: vertical position = init-y-vel * t - 1/2 * 0.002 * t * t where init-y-vel is the initial velocity in the vertical direction, and 0.002 is the gravitational acceleration, which is a constant.