Posted by bere on Tuesday, March 8, 2011 at 4:13pm.
An object is dropped from a platform 400 ft high. Ignoring wind resistance, how long will it take to reach the ground?

physics  Ian, Tuesday, March 8, 2011 at 7:17pm
y = Vi(t) + 1/2(a)(t^2)
400 = (0m/s)t + 1/2(9.8)(t^2)
use the quadratic equation to solve for t