Question

29.
A body projected along a rough horizontal surface with 6 ms comes to rest after
travelling a distance of 9 m. Then coefficient of sliding friction is (g= 10 ms?)
1) 0.2
2) 0.4
3) 0.6
4) 0.8​

Answer 1

ANSWER

Friction acts as deceleration force on the body,

ma=μmg

a=μg

Distance traveled before coming to rest is 9 m.

v  

2

−u  

2

=2as

0−6  

2

=−2(μg)(9)

μ=  

2×10×9

36

​  

=0.2

Answer 2

3)0.6 is the correct one