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Grade 12th passMechanics

a ball is dropped on the ground from a height 10cm .if coifficient of restitution is 0.4, then find the height to which ball is rebound ?

Profile image of Shaima Nishar
9 Years agoGrade 12th pass
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1 Answer

Profile image of Vikas TU
9 Years ago
Final velocity would be,
v = root( 0 + 2g*10/100) = > root(2) m/s.
From coeff. of restitution,
v’ = ev = > 0.4*v
Now let h be the height it rebounced then,
0^2 = (0.4v)^2 – 2gh
h = 0.16v^2/2g = > 0.16v^2/20 = > 0.32/20 = > 0.016 meter.

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