A body is moving down a long-inclined plane of slope 37 0 . The coefficient of friction between the body and plane varies as µ= 0.3x, where x is the distance travelled down the plane. The body will have maximum speed - (sin 37 0 = 
and g = 10 m/s 2 )
Text Solution
Verified by ExpertsThe correct answer is:
D
After some time, friction becomes more than mg sinθ, then body will retard. Thus speed is maximum when, total force or acc. is zero.
Mg sin θ – μ mg cos θ = 0
⇒ μ = tan θ ⇒ 0.3x = ¾
⇒ x = 2.5m
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