Author Question: A ball is projected 125 meters straight upward and then falls the same distance back to its starting ... (Read 126 times)

craiczarry · **on:** Jul 29, 2018

A ball is projected 125 meters straight upward and then falls the same distance back to its starting point. Neglecting air resistance, its total time in the air is about

A) 5 s.
B) 10 s.
C) 15 s.
D) more than 20 s.

Question 2

Neglecting air resistance, a ball projected straight upward so it remains in the air for 10 seconds needs an initial speed of

A) 50 m/s.
B) 60 m/s.
C) 80 m/s.
D) 100 m/s.
E) 110 m/s.