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chawki
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Homework Statement
When the ball dropped from a height of 2.5 m on the floor, it bounces back to 1.4 m in height.
Air resistance is taken into account. g= 9.81 m/s2
Homework Equations
a) the speed at which the ball hits the floor?
b) How much of the energy consumed in collision with a change of direction?
The Attempt at a Solution
a)
V2-V02=2gh
V=[tex]\sqrt{}(2gh)[/tex]
V=[tex]\sqrt{}2*9.81*2.5[/tex]
V=7m/s
i'm wondering why they gave us the information that the ball will bounce 1.4m high...
b)
E=1/2*m*V2
we don't have the mass of the ball