KinematicsHard
Question
A smooth block is released at rest on a 45o incline and then slides a distance d. The time take to slide is n times as much to slide on rough incline friction is
Options
A.μk = 
B.μk = 
C.μs =
D.
Solution
d =
(g sin μ¸)t1,d =
(g sin μ¸ - μg cos μ¸)t2t1 =
t2
According to qustion, t2 = nt1
n
= 
n =
µ cos 45o = sin 45o = 
        d =
(g sin θ)t1,d =
(g sin θ - μg cos θ)t2t1 =
According to qustion, t2 = nt1
n
= n =
∵ cos 45o = sin 45o = n2 =
or 1 - μk = Create a free account to view solution
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