[" If "mu_(ss)mu_(k)" arid "mu_(r)],[" firiction,sliding "f_(1)]

if mu_(s),mu_(k) and mu_(r) are coefficeints of static friction, sliding friction and rolling friction, then.

If mu_(s), mu_(k) and mu_(r) are the coefficients of static, kinetic and rolling friction respectively then

If mu_(s), mu_(k) and mu_(r) are the coefficients of static, kinetic and rolling friction respectively then

The refractive indices of three media 1,2 and 3 and mu_(1),mu_(2) and mu_(3) respectively (mu_(1) gt mu_(2) gt mu_(3)) . Which of the following statements are correct?

Arrange mu_s, mu_k and mu_r in descending order.

Arrange mu_s , mu_k and mu_r in ascending order.

R is the radius of curvature for both the surfaces of lens shown in figure. Refractive index mu_(1), mu_(2) and mu_(3) are indicated in the figure. Light rays are incident from the side of refractive index mu_(1) as shown. If f is focal length of lens then find f//R for mu_(1) = 1, mu_(2)= 1.5, mu_(3)= 2 . |{:(0,1,2,3,4,5,6,7,8,9):}|