Free fall: To determine the height of a flagpole, Abby throws a ball straight up and times it. She sees that the ball goes by the top of the pole after 0.50 s and then reaches the top of the pole again after a total elapsed time of 4.1 s. How high is the pole above the point where the ball was launched? (You can ignore air resistance.)
A) 10 m
B) 13 m
C) 16 m
D) 18 m
E) 26 m

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The Answer of Free fall: To determine the height of a flagpole, Abby throws a ball straight up and times it. She sees that the ball goes by the top of the pole after 0.50 s and then reaches the top of the pole again after a total elapsed time of 4.1 s. How high is the pole above the point where the ball was launched? (You can ignore air resistance.)
A) 10 m
B) 13 m
C) 16 m
D) 18 m
E) 26 m

Free Fall: to Determine the Height of a Flagpole, Abby