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A particle is thrown with kinetic energy k straight up a rough inclined plane of inclination alpha and coefficient of friction mu.The work done against friction before the particle comes to rest is

A particle is thrown with kinetic energy k straight up a rough inclined plane of inclination alpha and coefficient of friction mu.The work done against friction before the particle comes to rest is

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Grade:12th pass

1 Answers

Vikas TU
14149 Points
4 years ago
Hiiii 
Work done in moving upward to inclination is 
E = Wfriction + Wgravity
Let the length at which the block will travel be L.
So, E = (mewmgcosQ)*L + mgsinQ* L ( I hve assumed alpha = Q) ….............1
 
Work done by friction = k *mew*mgcosQ*L.......................2
 
Work done aginst friction = 2/1
 
You will get ans as D . 
 

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