A projectile is dropped, and reaches the ground at 140 m/s. How long does it take the projectile to reach ground? (Assume the position function is , where a = -10 .)
A) 7 s
B) 28 s
C) 4.47 s
D) 14 s
E) 3.16 s

Question

A projectile is dropped, and reaches the ground at 140 m/s. How long does it take the projectile to reach ground? (Assume the position function is  , where a = -10  .)
A) 7 s 
B) 28 s 
C) 4.47 s 
D) 14 s 
E) 3.16 s

Quizplus · Accepted Answer

The Answer of A projectile is dropped, and reaches the ground at 140 m/s. How long does it take the projectile to reach ground? (Assume the position function is  , where a = -10  .)
A) 7 s 
B) 28 s 
C) 4.47 s 
D) 14 s 
E) 3.16 s

A Projectile Is Dropped, and Reaches the Ground at 140