Starting from rest, the time taken by a body sliding down on a rough inclined plane at 450 with the horizontal is twice the time taken to travel on a smooth plane of same inclination and same distance. Then, the coefficient of kinetic friction is

1) 0.25

2) 0.33

3) 0.50

4) 0.75

Answer: 4) 0.75

Solution:

Coefficient of kinetic friction, μ = tanθ[1 – 1/n2]

here θ = 450

and n=2

μ = tan 450[1 – 1/22]

= 1 – 1/4

= 3/4 

= 0.75

Was this answer helpful?

 
   

5 (1)

(1)
(0)

Choose An Option That Best Describes Your Problem

Thank you. Your Feedback will Help us Serve you better.

Leave a Comment

Your Mobile number and Email id will not be published. Required fields are marked *

*

*

Ask
Question