Imagine a rock is dropped from the top of a tall building. After 2 seconds of falling the rock is instantaneous speed In approximately 20m/s

This is True.

Explanation:

initial velocity = Vi=0

final velocity = V

acceleration due to gravity = 9.8 m/s²

using the kinematic equation V = Vi+gt

V=0 + (9.8) (2)

V = 19.6 m/s which is approximately equal to 20 m/s

Thus after 2 seconds, the instantaneous speed of the rock is approximately 20 m/s.