यदि `mu_(s), mu_(k)` और `mu_(r)` क्रमशः स्थैतिक, गतिक और लोटनिक घर्षण गुणांक हों तो -

Which is grater mu_(s) or mu_(k)

Arrange mu_s, mu_k and mu_r in descending order.

Arrange mu_s , mu_k and mu_r in ascending order.

Which is greater mu_s or mu_k ?

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

A particle is at rest on a rough horizontal plane . The plane is slowly titled until the particle starts to move and is then kept fixed . If the static and kinetic coefficients of friction are mu_(s) and mu_(k) ( lt mu_(s)) respectively , show that the velocity of the particle after it has travelled distance d is given by : v = sqrt((2(mu_(s) - mu_(k))"gd")/((1 + mu_(s)^(2))^(1//2)))

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

A right angled prism of refractive index mu_(1) is placed in a rectangular block of refractive index mu_(2) , which is surrounded by a medium of refractive index mu_(3) ,as shown in the figure . A ray of light 'e' enters the rectangular block at normal incidence . depending upon the relationship between mu_(1) , mu_(2) "and" mu_(3) , it takes one of the four possible paths 'ef' , 'eg' , 'eh' or 'ef' Match the paths in List I with conditions of refractive indices in List II and select the correct answer using the codes given below the lists: {:("List" I , "List" II) , ( P. e rarr f , 1. mu_(1)gt sqrt(2mu_(2))) , ( Q. e rarr g , 2. mu_(2) gt mu_(1) "and" mu_(2) gt mu_(3)), ( R. e rarr f , 3. mu_(1) = mu_(2)), ( S. e rarr f , 4. mu_(2) lt mu_(1) lt sqrt(2mu_(2)) "and" mu_(2) gt mu_(3)):} Codes : {:( P , Q , R , S) , ((A) 2 , 3 , 1 , 4), ((B) 1 , 2 , 4 , 3) , ((C) 4 , 1 , 2 , 3) , ((D) 2, 3 , 4 , 1):}