- #1
bryansonex
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Homework Statement
A ball falls on the surface from 10m height and rebounds to 2.5m.If duration of contact with floor is 0.01 sec,then average acceleration during contact is-
g = 10m/s^2
Homework Equations
[tex]
\alpha = \frac{v_2 + v_1}{t}
[/tex]
The Attempt at a Solution
Now here
[tex]
v_{1} = \sqrt{2gh_{1}
[/tex]
[tex]
v_{1} = \sqrt{50}
[/tex]
and
[tex]
v_{2} = \sqrt{2gh_{2}
[/tex]
[tex]
v_{2} = \sqrt{200}
[/tex]
[tex]
\alpha = \frac{\sqrt{200+50}}{0.01}
[/tex]
After solving all of this,I get the answer the answer as 1581.14 m/s^2,but the answer in the book is 2100 m/s^2.Am i doing anything wrong over here?