Question 312943
8. Answer the question. You will need to use the formula 4.9t2 + v0t = s, where t is the time in seconds, v0 is the initial velocity, and s is the distance in meters. 
Approximately how far will an object fall in 4 seconds, if it is thrown downward at an initial velocity of 20 meters per second (v0) from a helicopter?
.
Given equation is:
{{{-4.9t^2 + v0t = s}}}
Notice there is a negative sign associated with the 4.9.
.
Plug in given info:
{{{-4.9(4)^2 + (-20)(4) = s}}}
{{{-4.9(16) + (-80) = s}}}
{{{-78.4 + (-80) = s}}}
{{{-78.4 - 80) = s}}}
{{{-158.4 = s}}} (meters)