Physics
posted by l .
An object is thrown vertically upward at 18m/s from a window and hits the
ground 1.6s later. What is the height of the window above the ground?(air
resistance is negligible)

Let h be the window height above ground.
At t = 1.6 seconds,
Elevation y = h + 18t 4.9t^2 = 0
so
h + 28.8 12.54 = 0
h would be negative. It cannot hit the ground that soon if thrown upaward at that high speed. Recheck you numbers
Respond to this Question
Similar Questions

Physics..please help
A car is traveling at 20m/s when it pulls out to pass a truck that is traveling at only 18m/s. The car accelerates at 2.0m/s^2 for 4.0 s and then maintains this new velocity. First it asked me to calculate the distance during acceleration … 
physics
A first object is thrown vertically upward with some initial speed and some initial height above the ground. Simultaneously, a second object is thrown straight down with the same initial speed and same initial height above the ground. … 
Physics
A stone is thrown vertically upward from outside a window, with an initial velocity of 24.0 m/s. It moves up, and then down to the ground 420 m below the point where it started. Let `up' be positive. (a) What is the maximum height … 
Physics
A stone is thrown vertically upward from outside a window, with an initial velocity of 24.0 m/s. It moves up, and then down to the ground 420 m below the point where it started. Let `up' be positive. (a) What is the maximum height … 
Physics
a tennis ball is thrown vertically upward from the ground and the student gazing out of the window sees it moving upward pass him at 5 m/sec. the window is 10 m above the ground. how high does the ball go above the ground 
Physics
A ball is thrown vertically upward from a window with an initial velocity of 10m/s. if it hits the ground below the window 5.0s later, what is the height of the window...can you tell me the steps on how to do this please... 
physics
A ball thrown straight up from the ground passes a window 5.6 m up. An observer looking out the window sees the ball pass the window again, going down, 3.4s later. Find the velocity with which the ball was initially thrown. 
Physics
From the window of a building, a ball is tossed from a height y 0 above the ground with an initial velocity of 10.00 m/s and angle of 25.0° below the horizontal. It strikes the ground 3.60 s later. If the base of the building is taken … 
physics
2 tall buildings are 200m apart. with what speed a ball be thrown horizontally from a window of one building 2km above the ground so that it will enter a window 40m from the ground in the other? 
Science
person is watching through a window of an apartment sees a ball that rises vertically upward and then vertically down for a total time of 0.5 seconds. if the height of the window is 2 metre, find the max height above the window reached …