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Astaircase contains three steps each 10 cm high and 20 cm wide as shown in the figure. What should be the minimum horizontal velocity of a ball rolling off the uppermost plane so as to hit directly the edge of the lowest plane ? [g=10 m//s^(2)] |
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Answer» SOLUTION :`h=30 cm` `S=60 cm = v sqrt((2h)/(G))` `=v sqrt((2xx30)/(1000))=v sqrt((3)/(50))` `:. V=(60)/(100) sqrt((50)/(3))=(3)/(4)XX sqrt((2)/(3))= sqrt(3) xx sqrt(2)` `=2.45 m//s` 
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