Asked by Katie

a ball is dropped from the top on an 80-m high building. what speed does the ball have in falling 3.5 s?
Answered by Damon
v = g t = 9.81 * 3.5 = 34.3 m/s
but what if it hit the ground?
d = (1/2) g t^2 = 60 meters
so it has not hit ground yet, whew
Answered by Katie
does this change the answer... the ball is dropped from the top of an 80-m-high building. does the ball reach the ground in 4.0 s?

I got no, it falls only 78 m in 4.0 s

What speed does the ball in the first question have in falling 3.5 s?
Answered by Damon
What speed does the ball in the first question have in falling 3.5 s?
-------------------
I told you in the first line, 34.3 m/s
-------------------
in 4 sec
d = .5 * 9.81 *16 = 78.5 meters
so no
Answered by Desiree
So how do you do that exact problem but if it is 4.0seconds?
Answered by suggamad
suggama d
Answered by Anonymous
A ball is dropped from the top of a 84-m-high building. What speed does the ball have in falling 3.4 s?
There are no AI answers yet. The ability to request AI answers is coming soon!