1.

Radius of level circular track is 20 m. If co­efficient of friction is 0.25, then what will be maximum safe speed ? (g = 9.8 ms^(2))

Answer»

Solution :`g= 9.8ms^(2)`
`r=20 m`
` g = 9.8 ms^(-2)`
`v_(AX)= SQRT(mu rg )`
`= squr(0.25 XX 20 xx 9.8 ) `
`=7m//s`


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