Answers

2014-12-21T22:20:29+05:30

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
2 a s =  v² - u²        =>       v² =  - 2 a s

     friction force = f =  m a = - x m g
       a = - x g

   v = √(2 x g s)
==================================
Kinetic energy of the body = 1/2 * m * v² 
Work done by friction when it stops the body = Force * distance = (μ m g) * (- s)

work done by friction = - initial kinetic energy + final kinetic energy
          - μ m g s =  0 - 1/2 m v²
       v² = 2 μ g s
                           v = √2μgs

1 5 1