according to the statement given what is the magnitude of the velocity of the rock just before it strikes the ground

Question

according to the statement given what is the magnitude of the velocity of the rock just before it strikes the ground

Answer 1

I have no idea what the statement is but in general if you drop something with no initial speed

v = sqrt (2 g h)
where h is height in meters
g = 9.81 m/s^2 on earth
v is in meters/second

If you used copy and paste, it does not work here and I can not see your problem.

Answer 2

To determine the magnitude of the velocity of the rock just before it strikes the ground, we need more information from the statement. Specifically, we need information about the initial height from which the rock is dropped and any other relevant details about the motion.