When You Throw a Stone Horizontally from the Top of a Cliff

Multiple Choice

When you throw a stone horizontally from the top of a cliff at 10 m/s, one second after leaving your hand its vertical distance below the top of the cliff is

A) 5 m.
B) 10 m.
C) 15 m.
And its speed at that instant is
D) 10 m/s.
E) about 14 m/s.
F) 15 m/s.
G) greater than 15 m/s.