For our discussion, you will address one of three slightly
different versions of the case of a ball falling to the base of a
50.0 m tall building.
Neglect air resistance.
The magnitude of the acceleration is 9.80 m/s2.
The eventual position of the ball is at the base of the
building, 50.0 m below this initial position.
Upward is defined as positive. Displacements, velocities and
accelerations directed upwards are positive. Conversely, if
directed downwards, these same quantities are negative. Thus, the
base of the building is located at -50.0 m, and acceleration is
-9.80 m/s2.
For the Case you are assigned, answer the following
questions. Support your answer with any necessary
calculations.
How long does the ball take to reach the base of the
building?
What is the final velocity of the ball just before striking the
ground?
Answer the additional questions for your Case as specified in
the table below.
You will be assigned to your case study based on the table
below:
Freefall Case 2: Near the edge of the building the ball is
thrown downward with an initial velocity of -10.0 m/s, at time t =
0.00 s.
Additional question: How do the results of this case study
change if the time when the ball is released is labeled 3.00 s,
rather than 0.00 s? Comment on the dependence of physical
results on the choice of labels, in this case, the initial time,
chosen by observers. After the results of case 1 have been
posted by at least one other student, compare your results for the
final velocity of the ball and time to for the ball to fall to the
results of case 1.