- #1
EvilBunny
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Homework Statement
An object is thrown up from the top of a building 50 m high. It rises to a maximum high of 20 m above the roof.
A) when does it land on the ground
B) At what velocity does it land ?
C) When is it 20 m below the roof?
Homework Equations
The 4 kinematics equations the ones I used where
Vf = Vi+ at
vf ² = vi ² + 2ax
The Attempt at a Solution
Well I am completely lost now. I don't know if we can do this in one shot or two.
I first found out how much time it takes for the ball to attein maximum height which gave me 2.02 seconds.
After I calculate the time it takes to go from that high to the ground and in total I got 6.35 s
but the textbook gave me 5.84
as for the velocity I had - 42 m/s
but the textbook says -37 m/s :S
I kept a lot of decimals so I don't think the mistake is there
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