Question

A stone is thrown vertically downward with an initial speed of 12.0 m/s from the top of a

building. The stone takes 1.54 s to reach the ground.

Answer 1

The question is incomplete; However, the height from which the stone is thrown is most likely to be what's required of the question

Answer:

See Explanation

Step-by-step explanation:

Given

`Initial\ Speed, u = 12.0m/s`

`Time, t = 1.54\ s`

Required

Determine the height

This question will be answered using the following equation of motion;

`S = ut + (1)/(2)gt^2`

Take g as 9.8

This gives:

`S = 12 * 1.54 + (1)/(2) * 9.8 * 1.54^2`

`S = 12 * 1.54 + (1)/(2) * 9.8 * 2.3716`

`S = 18.48 + 11.62084`

`S = 30.10084`

`S = 30.1\ m` (Approximated)

Hence; Height = 30.1m