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Question

A railway carriage has its centre of gravity at a height of 1m above the rails , which are 1.5m apart.The maximum safe speed at which it could travel round an unbanked curve of radius 100m is

A
12m/s
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B
18m/s
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C
22m/s
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D
27m/s
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Solution

The correct option is D 27m/s
Here, h=1m,r=100m,and2x=1.5m
For no skidding
mv2r×h=mgx
v=grxh
=9.8×100×0.751
=v=27.1m/s

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