Question

Ignoring air resistance, the velocity of an object, v, in meters per second can be found after the object has fallen h meters by using the formula v=â19.6h. Find the velocity of a rock that has fallen 21 meters after being dropped from a cliff.

Answer 1

Below

Step-by-step explanation:

I believe that equation is v = sqrt ( 19.6 h )

when h = 21 :

v = sqrt (19.6 * 21) = 20.3 m/s