Question

A rock is dropped straight down from the top of a 185.0 meter building. How long does it take for the rock to hit the ground?

Answer 1

Answer: 18.86sec

Step-by-step explanation:

Assuming no wind resistance use the rate of gravity: 9.80665 m/s

`185.0 m * (1sec)/(9.80665 m) = 18.8647... seconds\\`

The meters in 185m and 9.8m/s cancel out leaving you with time then

round to 4 digits (sigfigs) = 18.86sec