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
View Solution FreeMore Kinematics Questions
A particle moving along a straight line with uniform acceleration has velocities 7m /s at A and 17 m/s at C. B is the mi...The velocity (v) - Distance (x) graph is shown in figure. Which graph represents acceleration (a) versus distance ( x ) ...A, B, C and are points in a vertical line such that AB = AC = CD. If a body falls from rest A, then the times of descend...A particle P is projected from a point on the surface of smooth inclined plane (see figure). Simultaneously another part...A body starts from rest and is uniformly accelerated for 30 s. The distance traveled in the first 10 s is x1, next 10 is...