Question

A student drops a rock from a bridge to the water 14.4 m below. With what speed does the rock strike the water? The acceleration of gravity is 9.8m/s^2.
Answer in units of m/s

Answer 1

Just plug your values into this kinematics equation:

\[v^2=v_0^2+2ad\]

Answer 2

how would i set it up?

Answer 3

The question gives the distance traveled, d, and the acceleration, a. We're also assuming that the rock started from rest, so v0 = 0 m/s. Plug the values in a solve for v to find the final speed!