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A staircase contains three steps each 10...

A staircase contains three steps each 10 cm high and 20 cm wide figure. What should be the minimum horizontal velocity of a bal rolling off the upper most plane so as to hit directly the lowest plane?

A

`42ms^(-1)`

B

`4.2ms^(-1)`

C

`24ms^(-1)`

D

`2.4ms^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
B
`R=usqrt((2h)/(g))`
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