Our aim now is to
plot a graph of v_{x} *versus*
t and v_{y}
*versus* t for the projectile motion data we
have generated with the simulation.We will start with the cell
D17 where we need to *calculate from data*
the instantaneous velocity of the projectile at the time step 1. Since our
delta_t is sufficiently small, we can
approximate the instantaneous velocity to the average velocity in the time
interval 2*delta_t with time step 1 in the
middle. Remind yourself that this is exactly the definition of the *
instantaneous velocity *as delta_t goes to
zero. (Also note that if the acceleration of the motion is a constant, the
instantaneous velocity at the middle time of an interval is equal to the
average velocity in that interval!). So the velocity in the cell D17 is calculated approximately (from
definition) as: =(B18-B16)/(2*delta_t).
If you
do not understand this part, PLEASE make it clear to yourself by asking your
instructor.
Enter =(C18-C16)/(2*delta_t) in cell E17 for v_{y}
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