Week #7

The problems that I'm having the most problems with are the ones were i canot decide which way it needs to be solved for example, "During a baseball game, a batter hits a pop-up to a fielder 68 m away.The acceleration of gravity is 9.8 m/s2 .If the ball remains in the air for 5.1 s, howhigh does it rise?Answer in units of m."  I do not know whether to use the range formula to solve for Vertical Displacement ( the vertical distance traveled) or if I need to find another given that I am not seein such as the max angle (45 degrees) (The measure of a plane between to lines ) I need to come in before school to talk to my teacher. I should have a study group with friends and read the textbook more by myself.
  1)When does a football, if thrown straight up into the air have an acceleration of 0?                            
                                A:) At the top                                  B:) Never  *
                                C:) As it moves upward                   D:) As it moves down
 2) If a vehicle is at rest and has a top speed of 265 mph but is unable to accelerate, what speed can you get it up to?
                                A:) 183 mph                                    B:) 0 *
                                C:)265 mph                                     D:) 5mph
3)    This picture is an example of ?
      a) Mass
      b) Velocity
      c) an Angle *
      d) Displacement