- #1
AlchemistK
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Homework Statement
A staircase contains three steps each of 10 cm high and 20cm wide(refer attachment).What should be the minimum horizontal velocity if a ball rolling off the uppermost plane so as to hit directly the lowest plane?
Homework Equations
s= u*t + 1/2 a*t^2
The Attempt at a Solution
In the vertical motion,
s= u*t + 1/2 a*t^2
=> 0.3 = 0 + 1/2 * 10 * t^2
=>t= [itex]\sqrt{}6[/itex] /10 s
therefore, v=s/t => 2.45 m/s
Where did i go wrong? The given answer is 2 m/s and i don't believe that its an approximation.