For our discussion, you will address one of three slightlydifferent versions of the case of a ball falling to the base of a50.0 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 thebuilding, 50.0 m below this initial position.
• Upward is defined as positive. Displacements, velocities andaccelerations directed upwards are positive. Conversely, ifdirected downwards, these same quantities are negative. Thus, thebase 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 thebuilding?
• What is the final velocity of the ball just before striking theground?
• Answer the additional questions for your Case as specified inthe table below.

• Freefall Case 1: Near the edge of the building the ball isthrown upward with an initial velocity of 14.7 m/s, at time t =0.00 s.

  Additional question: If downward were to have been chosen as thepositive direction, how would this affect the values ofdisplacement, velocity, and acceleration given in the descriptionof the case study? Comment on the dependence of physical results,if any, on the choice of the positive direction chosen byobservers.