(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A stone is thrown horizontally at 5.0 m/s from the top of a cliff 78.4 m high.

a. How long does it take the stone to reach the bottom of the cliff?

b. How far from the base of the cliff does the stone strike the ground?

c. What are the horizontal and vertical components of the velocity of the stone just before it h its the ground?

2. Relevant equations

a. yf = yi + vyi t + (1/2)at^2

b. xf = xi + vxi t

c. ?????

3. The attempt at a solution

a. 0 = 78.4 + 0 - 4.9t^2

78.4 + 0 - 4.9t^2

-4.9t^2 = -78.4

t= 4 sec...is this correct?

b. xf = 0 + 5m/s(4 sec)

= 20 m..is this correct??

c. I have no idea how to do this please help

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# Homework Help: Projectile Motion - Horizontal Launch

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