Solve the Problem $g = 9.8 \mathrm {~m} / \mathrm { sec } ^ { 2 }$

Multiple Choice

Solve the problem.
-At about what velocity do you enter the water is you jump from a 15 meter cliff? (Use $g = 9.8 \mathrm {~m} / \mathrm { sec } ^ { 2 }$ .)

A) $17 \mathrm {~m} / \mathrm { sec }$
B) $2 \mathrm {~m} / \mathrm { sec }$
C) $- 8.5 \mathrm {~m} / \mathrm { sec }$
D) $- 17 \mathrm {~m} / \mathrm { sec }$