Recall that the height of an object t seconds after it begins moving when gravity is the only force acting on the object is given
h(t)=-16x^2 + v0t + h0
h(t) is given in feet
v0 = initial velocity of object in ft/sec
ho= initial height of object in feet
If the feather is dropped from the top of the bridge 90 feet above a river, how long does it take the feather to reach the water?

Question

Recall that the height of an object t seconds after it begins moving when gravity is the only force acting on the object is given
h(t)=-16x^2 + v0t + h0
h(t) is given in feet
v0 = initial velocity of object in ft/sec
ho= initial height of object in feet
If the feather is dropped from the top of the bridge 90 feet above a river, how long does it take the feather to reach the water?

stamp · Answer

$$h(t)=-16x^2=v_{0}t+h_{0}$$$$v_{0}=0\ ft/sec$$$$h_{0}=90\ ft$$$$Find\ t.$$