NEET-XII-Physics

exam-1 year:2016

with Solutions - page 3
Qstn# 45 Prvs-Qstn
  • #45
    A car is negotiating a curved road of radius R. The
    road is banked at an angle ``\theta``. the coefficient of
    friction between the tyres of the car and the road
    is µs. The maximum safe velocity on this road is :-
    (1)``\sqrt {gR^2 \frac{µs + tan\theta}{1- µs tan \theta}}``
    (2)``\sqrt {gR \frac{µs + tan\theta}{1- µs tan \theta}}``
    (3)
    (4)
    digAnsr:   2
    Ans : 2
    Sol.
      + 
    =   
    2
    s
    s
    tanv
    Rg 1- tan
    &implies;
      + 
    =  
      
    s
    s
    tan
    v Rg
    1- tan