Question

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

Answer 1

This is True.

Step-by-step 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.