- #1

2ndperiod

- 4

- 0

## Homework Statement

A ball is thrown horizontally from the top of a building 54.5 m high. The ball strikes the ground at a point 61 m from the base of the building.

The acceleration of gravity is 9.8 m/s^2 (9.8 meters per second squared)

1. Find the time the ball is in motion. (in units of s)

2. Find the initial velocity of the ball (in units of m/s)

3. Find the x component of its velocity just before it strikes the ground. (in units of m/s)

4. Find the y component of its velocity just before it strikes the ground.

HELP! please!

## Homework Equations

Delta X = VX T

R = (Vsquared sin (2 x angle)) / g

Delta Y = (1/2) (Vyi + Vyf) (t)

Vyf = Vyi - (g)(t)

Delta Y = (Vyi)(t) - (1/2)(g)(Tsquared)

Vyfsquared = Vyisquared - (2)(g)(Delta Y)

## The Attempt at a Solution

If someone could just tell me which formulas to use, that would be great. I know I need to solve for t for #1, and need to solve for Vyi for #2.