QX3zay? Jump to level 1 The position of an object falling from a cliff with respect to the ground is given by s(t) = -4.9t2 + 69 where t is in seconds and s(t) is in meters. After how many seconds does the object hit the ground? 3.75 seconds What is the instantaneous velocity when the object hits the ground? am/s What is the average velocity? m/s 2 Check Next