A car is moving on a ciirular level road of curvature 300 m. If the coefficient of friction is 0.3 and acceleration due to gravity 10 `ms^-2`, the maximum speed that car can have is

Options

A. `30kmh^-1`
B. `81kmh^-1`
C. `108 kmh^-1`
D. `162kmh^-1`

Explanation

Range ,R=2m
Horizontal range,
`R=(u^2(sin2theta))/g`
`implies(u^2(sin2theta))/g=2`
`impliesu^2(sin(2xx45))/g=2`
`implies(u^2(1))/g=2`
`:.u=sqrt(2g)`.